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Finding the Fourth Proportional to 188,691.60, 260,385 and 103,806.48

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Solution

The fourth proportional to 188,691.60, 260,385 and 103,806.48 is: 143,247.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,691.60 : 260,385 = 103,806.48 : x
  2. Step 2: Convert to fraction form
    188,691.60/260,385 = 103,806.48/x
  3. Step 3: Cross multiply
    188,691.60x = 260,385 × 103,806.48
  4. Step 4: Simplify right side
    188,691.60x = 27,029,650,294.80
  5. Step 5: Solve for x
    x = 27,029,650,294.80/188,691.60
  6. Step 6: Final answer
    x = 143,247.77

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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.