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Finding the Fourth Proportional to 124,933.80, 187,400.70 and 72,478.20

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Solution

The fourth proportional to 124,933.80, 187,400.70 and 72,478.20 is: 108,717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,933.80 : 187,400.70 = 72,478.20 : x
  2. Step 2: Convert to fraction form
    124,933.80/187,400.70 = 72,478.20/x
  3. Step 3: Cross multiply
    124,933.80x = 187,400.70 × 72,478.20
  4. Step 4: Simplify right side
    124,933.80x = 13,582,465,414.74
  5. Step 5: Solve for x
    x = 13,582,465,414.74/124,933.80
  6. Step 6: Final answer
    x = 108,717.30

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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.