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Finding the Fourth Proportional to 74,490.60, 111,737.12 and 18,330.87

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Solution

The fourth proportional to 74,490.60, 111,737.12 and 18,330.87 is: 27,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,490.60 : 111,737.12 = 18,330.87 : x
  2. Step 2: Convert to fraction form
    74,490.60/111,737.12 = 18,330.87/x
  3. Step 3: Cross multiply
    74,490.60x = 111,737.12 × 18,330.87
  4. Step 4: Simplify right side
    74,490.60x = 2,048,238,529.24
  5. Step 5: Solve for x
    x = 2,048,238,529.24/74,490.60
  6. Step 6: Final answer
    x = 27,496.60

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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.