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Finding the Fourth Proportional to 125,499.57, 187,778.81 and 74,712.82

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Solution

The fourth proportional to 125,499.57, 187,778.81 and 74,712.82 is: 111,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,499.57 : 187,778.81 = 74,712.82 : x
  2. Step 2: Convert to fraction form
    125,499.57/187,778.81 = 74,712.82/x
  3. Step 3: Cross multiply
    125,499.57x = 187,778.81 × 74,712.82
  4. Step 4: Simplify right side
    125,499.57x = 14,029,484,431.34
  5. Step 5: Solve for x
    x = 14,029,484,431.34/125,499.57
  6. Step 6: Final answer
    x = 111,789.10

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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.