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Finding the Fourth Proportional to 123,644.36, 170,600.64 and 83,432.72

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Solution

The fourth proportional to 123,644.36, 170,600.64 and 83,432.72 is: 115,117.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,644.36 : 170,600.64 = 83,432.72 : x
  2. Step 2: Convert to fraction form
    123,644.36/170,600.64 = 83,432.72/x
  3. Step 3: Cross multiply
    123,644.36x = 170,600.64 × 83,432.72
  4. Step 4: Simplify right side
    123,644.36x = 14,233,675,428.94
  5. Step 5: Solve for x
    x = 14,233,675,428.94/123,644.36
  6. Step 6: Final answer
    x = 115,117.87

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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.