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Finding the Fourth Proportional to 123,730, 170,747.92 and 67,141.76

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Solution

The fourth proportional to 123,730, 170,747.92 and 67,141.76 is: 92,655.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,730 : 170,747.92 = 67,141.76 : x
  2. Step 2: Convert to fraction form
    123,730/170,747.92 = 67,141.76/x
  3. Step 3: Cross multiply
    123,730x = 170,747.92 × 67,141.76
  4. Step 4: Simplify right side
    123,730x = 11,464,315,865.14
  5. Step 5: Solve for x
    x = 11,464,315,865.14/123,730
  6. Step 6: Final answer
    x = 92,655.91

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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.