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Finding the Fourth Proportional to 124,737.60, 187,106.40 and 74,971.20

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Solution

The fourth proportional to 124,737.60, 187,106.40 and 74,971.20 is: 112,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,737.60 : 187,106.40 = 74,971.20 : x
  2. Step 2: Convert to fraction form
    124,737.60/187,106.40 = 74,971.20/x
  3. Step 3: Cross multiply
    124,737.60x = 187,106.40 × 74,971.20
  4. Step 4: Simplify right side
    124,737.60x = 14,027,591,335.68
  5. Step 5: Solve for x
    x = 14,027,591,335.68/124,737.60
  6. Step 6: Final answer
    x = 112,456.80

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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.