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Finding the Fourth Proportional to 65,788.80, 98,634.60 and 28,318.20

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Solution

The fourth proportional to 65,788.80, 98,634.60 and 28,318.20 is: 42,456.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,788.80 : 98,634.60 = 28,318.20 : x
  2. Step 2: Convert to fraction form
    65,788.80/98,634.60 = 28,318.20/x
  3. Step 3: Cross multiply
    65,788.80x = 98,634.60 × 28,318.20
  4. Step 4: Simplify right side
    65,788.80x = 2,793,154,329.72
  5. Step 5: Solve for x
    x = 2,793,154,329.72/65,788.80
  6. Step 6: Final answer
    x = 42,456.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.