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Finding the Fourth Proportional to 125,019.78, 187,549.10 and 40,760.37

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Solution

The fourth proportional to 125,019.78, 187,549.10 and 40,760.37 is: 61,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,019.78 : 187,549.10 = 40,760.37 : x
  2. Step 2: Convert to fraction form
    125,019.78/187,549.10 = 40,760.37/x
  3. Step 3: Cross multiply
    125,019.78x = 187,549.10 × 40,760.37
  4. Step 4: Simplify right side
    125,019.78x = 7,644,570,709.17
  5. Step 5: Solve for x
    x = 7,644,570,709.17/125,019.78
  6. Step 6: Final answer
    x = 61,146.89

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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.