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Finding the Fourth Proportional to 100,279.80, 138,382.02 and 59,969.76

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Solution

The fourth proportional to 100,279.80, 138,382.02 and 59,969.76 is: 82,755.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,279.80 : 138,382.02 = 59,969.76 : x
  2. Step 2: Convert to fraction form
    100,279.80/138,382.02 = 59,969.76/x
  3. Step 3: Cross multiply
    100,279.80x = 138,382.02 × 59,969.76
  4. Step 4: Simplify right side
    100,279.80x = 8,298,736,527.72
  5. Step 5: Solve for x
    x = 8,298,736,527.72/100,279.80
  6. Step 6: Final answer
    x = 82,755.81

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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.