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Finding the Fourth Proportional to 84,616.32, 126,690.88 and 63,776.64

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Solution

The fourth proportional to 84,616.32, 126,690.88 and 63,776.64 is: 95,488.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,616.32 : 126,690.88 = 63,776.64 : x
  2. Step 2: Convert to fraction form
    84,616.32/126,690.88 = 63,776.64/x
  3. Step 3: Cross multiply
    84,616.32x = 126,690.88 × 63,776.64
  4. Step 4: Simplify right side
    84,616.32x = 8,079,918,645.04
  5. Step 5: Solve for x
    x = 8,079,918,645.04/84,616.32
  6. Step 6: Final answer
    x = 95,488.89

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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.