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Finding the Fourth Proportional to 78,886.55, 108,867.87 and 43,079.90

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Solution

The fourth proportional to 78,886.55, 108,867.87 and 43,079.90 is: 59,452.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.55 : 108,867.87 = 43,079.90 : x
  2. Step 2: Convert to fraction form
    78,886.55/108,867.87 = 43,079.90/x
  3. Step 3: Cross multiply
    78,886.55x = 108,867.87 × 43,079.90
  4. Step 4: Simplify right side
    78,886.55x = 4,690,016,952.81
  5. Step 5: Solve for x
    x = 4,690,016,952.81/78,886.55
  6. Step 6: Final answer
    x = 59,452.68

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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.