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Finding the Fourth Proportional to 120,091.92, 165,718.08 and 66,373.92

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Solution

The fourth proportional to 120,091.92, 165,718.08 and 66,373.92 is: 91,591.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,091.92 : 165,718.08 = 66,373.92 : x
  2. Step 2: Convert to fraction form
    120,091.92/165,718.08 = 66,373.92/x
  3. Step 3: Cross multiply
    120,091.92x = 165,718.08 × 66,373.92
  4. Step 4: Simplify right side
    120,091.92x = 10,999,358,584.47
  5. Step 5: Solve for x
    x = 10,999,358,584.47/120,091.92
  6. Step 6: Final answer
    x = 91,591.16

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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.