Home / 78,889,243.78-118,333,865.97-21,381,515.02

Finding the Fourth Proportional to 78,889,243.78, 118,333,865.97 and 21,381,515.02

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Solution

The fourth proportional to 78,889,243.78, 118,333,865.97 and 21,381,515.02 is: 32,072,272.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,889,243.78 : 118,333,865.97 = 21,381,515.02 : x
  2. Step 2: Convert to fraction form
    78,889,243.78/118,333,865.97 = 21,381,515.02/x
  3. Step 3: Cross multiply
    78,889,243.78x = 118,333,865.97 × 21,381,515.02
  4. Step 4: Simplify right side
    78,889,243.78x = 2,530,157,332,612,222
  5. Step 5: Solve for x
    x = 2,530,157,332,612,222/78,889,243.78
  6. Step 6: Final answer
    x = 32,072,272.61

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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.