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Finding the Fourth Proportional to 99,781.44, 149,555.52 and 55,397.76

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Solution

The fourth proportional to 99,781.44, 149,555.52 and 55,397.76 is: 83,031.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,781.44 : 149,555.52 = 55,397.76 : x
  2. Step 2: Convert to fraction form
    99,781.44/149,555.52 = 55,397.76/x
  3. Step 3: Cross multiply
    99,781.44x = 149,555.52 × 55,397.76
  4. Step 4: Simplify right side
    99,781.44x = 8,285,040,803.64
  5. Step 5: Solve for x
    x = 8,285,040,803.64/99,781.44
  6. Step 6: Final answer
    x = 83,031.88

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1.5x scale

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.