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Finding the Fourth Proportional to 99,481.50, 137,401.11 and 65,889.18

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Solution

The fourth proportional to 99,481.50, 137,401.11 and 65,889.18 is: 91,004.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,481.50 : 137,401.11 = 65,889.18 : x
  2. Step 2: Convert to fraction form
    99,481.50/137,401.11 = 65,889.18/x
  3. Step 3: Cross multiply
    99,481.50x = 137,401.11 × 65,889.18
  4. Step 4: Simplify right side
    99,481.50x = 9,053,246,468.99
  5. Step 5: Solve for x
    x = 9,053,246,468.99/99,481.50
  6. Step 6: Final answer
    x = 91,004.32

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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.