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Finding the Fourth Proportional to 123,432.53, 170,365.68 and 87,633.77

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Solution

The fourth proportional to 123,432.53, 170,365.68 and 87,633.77 is: 120,955.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,432.53 : 170,365.68 = 87,633.77 : x
  2. Step 2: Convert to fraction form
    123,432.53/170,365.68 = 87,633.77/x
  3. Step 3: Cross multiply
    123,432.53x = 170,365.68 × 87,633.77
  4. Step 4: Simplify right side
    123,432.53x = 14,929,785,965.19
  5. Step 5: Solve for x
    x = 14,929,785,965.19/123,432.53
  6. Step 6: Final answer
    x = 120,955.04

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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.