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Finding the Fourth Proportional to 71,484.10, 98,640.10 and 39,645.02

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Solution

The fourth proportional to 71,484.10, 98,640.10 and 39,645.02 is: 54,705.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,484.10 : 98,640.10 = 39,645.02 : x
  2. Step 2: Convert to fraction form
    71,484.10/98,640.10 = 39,645.02/x
  3. Step 3: Cross multiply
    71,484.10x = 98,640.10 × 39,645.02
  4. Step 4: Simplify right side
    71,484.10x = 3,910,588,737.30
  5. Step 5: Solve for x
    x = 3,910,588,737.30/71,484.10
  6. Step 6: Final answer
    x = 54,705.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.