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Finding the Fourth Proportional to 71,545.84, 98,728.29 and 39,712.23

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Solution

The fourth proportional to 71,545.84, 98,728.29 and 39,712.23 is: 54,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,545.84 : 98,728.29 = 39,712.23 : x
  2. Step 2: Convert to fraction form
    71,545.84/98,728.29 = 39,712.23/x
  3. Step 3: Cross multiply
    71,545.84x = 98,728.29 × 39,712.23
  4. Step 4: Simplify right side
    71,545.84x = 3,920,720,559.99
  5. Step 5: Solve for x
    x = 3,920,720,559.99/71,545.84
  6. Step 6: Final answer
    x = 54,800.12

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Double scale
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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.