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Finding the Fourth Proportional to 124,617.60, 187,120.80 and 72,129.60

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Solution

The fourth proportional to 124,617.60, 187,120.80 and 72,129.60 is: 108,306.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,617.60 : 187,120.80 = 72,129.60 : x
  2. Step 2: Convert to fraction form
    124,617.60/187,120.80 = 72,129.60/x
  3. Step 3: Cross multiply
    124,617.60x = 187,120.80 × 72,129.60
  4. Step 4: Simplify right side
    124,617.60x = 13,496,948,455.68
  5. Step 5: Solve for x
    x = 13,496,948,455.68/124,617.60
  6. Step 6: Final answer
    x = 108,306.92

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1.5x scale

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.