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Finding the Fourth Proportional to 124,925.80, 187,388.70 and 72,470.20

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Solution

The fourth proportional to 124,925.80, 187,388.70 and 72,470.20 is: 108,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,925.80 : 187,388.70 = 72,470.20 : x
  2. Step 2: Convert to fraction form
    124,925.80/187,388.70 = 72,470.20/x
  3. Step 3: Cross multiply
    124,925.80x = 187,388.70 × 72,470.20
  4. Step 4: Simplify right side
    124,925.80x = 13,580,096,566.74
  5. Step 5: Solve for x
    x = 13,580,096,566.74/124,925.80
  6. Step 6: Final answer
    x = 108,705.30

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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.