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Finding the Fourth Proportional to 99,340.80, 149,011.20 and 63,911.40

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Solution

The fourth proportional to 99,340.80, 149,011.20 and 63,911.40 is: 95,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,340.80 : 149,011.20 = 63,911.40 : x
  2. Step 2: Convert to fraction form
    99,340.80/149,011.20 = 63,911.40/x
  3. Step 3: Cross multiply
    99,340.80x = 149,011.20 × 63,911.40
  4. Step 4: Simplify right side
    99,340.80x = 9,523,514,407.68
  5. Step 5: Solve for x
    x = 9,523,514,407.68/99,340.80
  6. Step 6: Final answer
    x = 95,867.10

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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.