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Finding the Fourth Proportional to 99,550.20, 137,407.50 and 65,583.48

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Solution

The fourth proportional to 99,550.20, 137,407.50 and 65,583.48 is: 90,523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,550.20 : 137,407.50 = 65,583.48 : x
  2. Step 2: Convert to fraction form
    99,550.20/137,407.50 = 65,583.48/x
  3. Step 3: Cross multiply
    99,550.20x = 137,407.50 × 65,583.48
  4. Step 4: Simplify right side
    99,550.20x = 9,011,662,028.10
  5. Step 5: Solve for x
    x = 9,011,662,028.10/99,550.20
  6. Step 6: Final answer
    x = 90,523.80

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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.