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Finding the Fourth Proportional to 124,993.26, 187,431.56 and 72,417.78

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Solution

The fourth proportional to 124,993.26, 187,431.56 and 72,417.78 is: 108,592.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,993.26 : 187,431.56 = 72,417.78 : x
  2. Step 2: Convert to fraction form
    124,993.26/187,431.56 = 72,417.78/x
  3. Step 3: Cross multiply
    124,993.26x = 187,431.56 × 72,417.78
  4. Step 4: Simplify right side
    124,993.26x = 13,573,377,477.14
  5. Step 5: Solve for x
    x = 13,573,377,477.14/124,993.26
  6. Step 6: Final answer
    x = 108,592.88

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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.