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Finding the Fourth Proportional to 77,996.92, 107,609.04 and 63,631.72

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Solution

The fourth proportional to 77,996.92, 107,609.04 and 63,631.72 is: 87,789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,996.92 : 107,609.04 = 63,631.72 : x
  2. Step 2: Convert to fraction form
    77,996.92/107,609.04 = 63,631.72/x
  3. Step 3: Cross multiply
    77,996.92x = 107,609.04 × 63,631.72
  4. Step 4: Simplify right side
    77,996.92x = 6,847,348,302.75
  5. Step 5: Solve for x
    x = 6,847,348,302.75/77,996.92
  6. Step 6: Final answer
    x = 87,789.98

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1.5x scale

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.