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Finding the Fourth Proportional to 123,575.92, 170,530.20 and 66,986.08

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Solution

The fourth proportional to 123,575.92, 170,530.20 and 66,986.08 is: 92,438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,575.92 : 170,530.20 = 66,986.08 : x
  2. Step 2: Convert to fraction form
    123,575.92/170,530.20 = 66,986.08/x
  3. Step 3: Cross multiply
    123,575.92x = 170,530.20 × 66,986.08
  4. Step 4: Simplify right side
    123,575.92x = 11,423,149,619.62
  5. Step 5: Solve for x
    x = 11,423,149,619.62/123,575.92
  6. Step 6: Final answer
    x = 92,438.31

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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.