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Finding the Fourth Proportional to 123,174.77, 169,981.62 and 66,586.15

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Solution

The fourth proportional to 123,174.77, 169,981.62 and 66,586.15 is: 91,889.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,174.77 : 169,981.62 = 66,586.15 : x
  2. Step 2: Convert to fraction form
    123,174.77/169,981.62 = 66,586.15/x
  3. Step 3: Cross multiply
    123,174.77x = 169,981.62 × 66,586.15
  4. Step 4: Simplify right side
    123,174.77x = 11,318,420,796.65
  5. Step 5: Solve for x
    x = 11,318,420,796.65/123,174.77
  6. Step 6: Final answer
    x = 91,889.12

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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.