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Finding the Fourth Proportional to 123,756.51, 170,784.05 and 67,167.88

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Solution

The fourth proportional to 123,756.51, 170,784.05 and 67,167.88 is: 92,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,756.51 : 170,784.05 = 67,167.88 : x
  2. Step 2: Convert to fraction form
    123,756.51/170,784.05 = 67,167.88/x
  3. Step 3: Cross multiply
    123,756.51x = 170,784.05 × 67,167.88
  4. Step 4: Simplify right side
    123,756.51x = 11,471,202,744.23
  5. Step 5: Solve for x
    x = 11,471,202,744.23/123,756.51
  6. Step 6: Final answer
    x = 92,691.72

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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.