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Finding the Fourth Proportional to 123,246.46, 170,080.20 and 66,657.82

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Solution

The fourth proportional to 123,246.46, 170,080.20 and 66,657.82 is: 91,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,246.46 : 170,080.20 = 66,657.82 : x
  2. Step 2: Convert to fraction form
    123,246.46/170,080.20 = 66,657.82/x
  3. Step 3: Cross multiply
    123,246.46x = 170,080.20 × 66,657.82
  4. Step 4: Simplify right side
    123,246.46x = 11,337,175,357.16
  5. Step 5: Solve for x
    x = 11,337,175,357.16/123,246.46
  6. Step 6: Final answer
    x = 91,987.84

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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.