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Finding the Fourth Proportional to 123,756.34, 170,784.21 and 67,167.72

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Solution

The fourth proportional to 123,756.34, 170,784.21 and 67,167.72 is: 92,691.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,756.34 : 170,784.21 = 67,167.72 : x
  2. Step 2: Convert to fraction form
    123,756.34/170,784.21 = 67,167.72/x
  3. Step 3: Cross multiply
    123,756.34x = 170,784.21 × 67,167.72
  4. Step 4: Simplify right side
    123,756.34x = 11,471,185,997.70
  5. Step 5: Solve for x
    x = 11,471,185,997.70/123,756.34
  6. Step 6: Final answer
    x = 92,691.70

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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.