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Finding the Fourth Proportional to 128,425.20, 193,600.32 and 119,862

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Solution

The fourth proportional to 128,425.20, 193,600.32 and 119,862 is: 180,691.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,425.20 : 193,600.32 = 119,862 : x
  2. Step 2: Convert to fraction form
    128,425.20/193,600.32 = 119,862/x
  3. Step 3: Cross multiply
    128,425.20x = 193,600.32 × 119,862
  4. Step 4: Simplify right side
    128,425.20x = 23,205,321,555.84
  5. Step 5: Solve for x
    x = 23,205,321,555.84/128,425.20
  6. Step 6: Final answer
    x = 180,691.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.