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Finding the Fourth Proportional to 123,438.28, 170,345.28 and 66,849.52

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Solution

The fourth proportional to 123,438.28, 170,345.28 and 66,849.52 is: 92,252.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,438.28 : 170,345.28 = 66,849.52 : x
  2. Step 2: Convert to fraction form
    123,438.28/170,345.28 = 66,849.52/x
  3. Step 3: Cross multiply
    123,438.28x = 170,345.28 × 66,849.52
  4. Step 4: Simplify right side
    123,438.28x = 11,387,500,202.27
  5. Step 5: Solve for x
    x = 11,387,500,202.27/123,438.28
  6. Step 6: Final answer
    x = 92,252.58

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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.