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Finding the Fourth Proportional to 90,871.44, 125,451.82 and 63,730.88

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Solution

The fourth proportional to 90,871.44, 125,451.82 and 63,730.88 is: 87,983.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,871.44 : 125,451.82 = 63,730.88 : x
  2. Step 2: Convert to fraction form
    90,871.44/125,451.82 = 63,730.88/x
  3. Step 3: Cross multiply
    90,871.44x = 125,451.82 × 63,730.88
  4. Step 4: Simplify right side
    90,871.44x = 7,995,154,886.20
  5. Step 5: Solve for x
    x = 7,995,154,886.20/90,871.44
  6. Step 6: Final answer
    x = 87,983.14

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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.