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Finding the Fourth Proportional to 210,630.96, 315,996.54 and 68,476.86

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Solution

The fourth proportional to 210,630.96, 315,996.54 and 68,476.86 is: 102,731.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.96 : 315,996.54 = 68,476.86 : x
  2. Step 2: Convert to fraction form
    210,630.96/315,996.54 = 68,476.86/x
  3. Step 3: Cross multiply
    210,630.96x = 315,996.54 × 68,476.86
  4. Step 4: Simplify right side
    210,630.96x = 21,638,450,830.06
  5. Step 5: Solve for x
    x = 21,638,450,830.06/210,630.96
  6. Step 6: Final answer
    x = 102,731.58

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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.