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Finding the Fourth Proportional to 66,387.74, 91,614.24 and 36,174.32

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Solution

The fourth proportional to 66,387.74, 91,614.24 and 36,174.32 is: 49,920.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,387.74 : 91,614.24 = 36,174.32 : x
  2. Step 2: Convert to fraction form
    66,387.74/91,614.24 = 36,174.32/x
  3. Step 3: Cross multiply
    66,387.74x = 91,614.24 × 36,174.32
  4. Step 4: Simplify right side
    66,387.74x = 3,314,082,834.32
  5. Step 5: Solve for x
    x = 3,314,082,834.32/66,387.74
  6. Step 6: Final answer
    x = 49,920.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.