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Finding the Fourth Proportional to 124,990.88, 187,505.87 and 40,731.48

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Solution

The fourth proportional to 124,990.88, 187,505.87 and 40,731.48 is: 61,103.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,990.88 : 187,505.87 = 40,731.48 : x
  2. Step 2: Convert to fraction form
    124,990.88/187,505.87 = 40,731.48/x
  3. Step 3: Cross multiply
    124,990.88x = 187,505.87 × 40,731.48
  4. Step 4: Simplify right side
    124,990.88x = 7,637,391,390.13
  5. Step 5: Solve for x
    x = 7,637,391,390.13/124,990.88
  6. Step 6: Final answer
    x = 61,103.59

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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.