Home / 71,539.27-98,728.67-39,708.70

Finding the Fourth Proportional to 71,539.27, 98,728.67 and 39,708.70

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Solution

The fourth proportional to 71,539.27, 98,728.67 and 39,708.70 is: 54,800.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,539.27 : 98,728.67 = 39,708.70 : x
  2. Step 2: Convert to fraction form
    71,539.27/98,728.67 = 39,708.70/x
  3. Step 3: Cross multiply
    71,539.27x = 98,728.67 × 39,708.70
  4. Step 4: Simplify right side
    71,539.27x = 3,920,386,990.88
  5. Step 5: Solve for x
    x = 3,920,386,990.88/71,539.27
  6. Step 6: Final answer
    x = 54,800.49

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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.