Home / 312,988,469,910.89-469,509,748,975.86-86,347,921,951.24

Finding the Fourth Proportional to 312,988,469,910.89, 469,509,748,975.86 and 86,347,921,951.24

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Solution

The fourth proportional to 312,988,469,910.89, 469,509,748,975.86 and 86,347,921,951.24 is: 129,529,343,913.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,988,469,910.89 : 469,509,748,975.86 = 86,347,921,951.24 : x
  2. Step 2: Convert to fraction form
    312,988,469,910.89/469,509,748,975.86 = 86,347,921,951.24/x
  3. Step 3: Cross multiply
    312,988,469,910.89x = 469,509,748,975.86 × 86,347,921,951.24
  4. Step 4: Simplify right side
    312,988,469,910.89x = 40,541,191,159,912,429,780,992
  5. Step 5: Solve for x
    x = 40,541,191,159,912,429,780,992/312,988,469,910.89
  6. Step 6: Final answer
    x = 129,529,343,913.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.