Home / 71,545.12-98,737.68-39,720.16

Finding the Fourth Proportional to 71,545.12, 98,737.68 and 39,720.16

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Solution

The fourth proportional to 71,545.12, 98,737.68 and 39,720.16 is: 54,816.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,545.12 : 98,737.68 = 39,720.16 : x
  2. Step 2: Convert to fraction form
    71,545.12/98,737.68 = 39,720.16/x
  3. Step 3: Cross multiply
    71,545.12x = 98,737.68 × 39,720.16
  4. Step 4: Simplify right side
    71,545.12x = 3,921,876,447.63
  5. Step 5: Solve for x
    x = 3,921,876,447.63/71,545.12
  6. Step 6: Final answer
    x = 54,816.83

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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.