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Finding the Fourth Proportional to 99,081, 136,731.78 and 54,371.88

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Solution

The fourth proportional to 99,081, 136,731.78 and 54,371.88 is: 75,033.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,081 : 136,731.78 = 54,371.88 : x
  2. Step 2: Convert to fraction form
    99,081/136,731.78 = 54,371.88/x
  3. Step 3: Cross multiply
    99,081x = 136,731.78 × 54,371.88
  4. Step 4: Simplify right side
    99,081x = 7,434,363,934.35
  5. Step 5: Solve for x
    x = 7,434,363,934.35/99,081
  6. Step 6: Final answer
    x = 75,033.19

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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.