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Finding the Fourth Proportional to 124,872.60, 187,308.90 and 40,640.70

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Solution

The fourth proportional to 124,872.60, 187,308.90 and 40,640.70 is: 60,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,872.60 : 187,308.90 = 40,640.70 : x
  2. Step 2: Convert to fraction form
    124,872.60/187,308.90 = 40,640.70/x
  3. Step 3: Cross multiply
    124,872.60x = 187,308.90 × 40,640.70
  4. Step 4: Simplify right side
    124,872.60x = 7,612,364,812.23
  5. Step 5: Solve for x
    x = 7,612,364,812.23/124,872.60
  6. Step 6: Final answer
    x = 60,961.05

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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.