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Finding the Fourth Proportional to 73,279.80, 109,919.70 and 66,500.10

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Solution

The fourth proportional to 73,279.80, 109,919.70 and 66,500.10 is: 99,750.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,279.80 : 109,919.70 = 66,500.10 : x
  2. Step 2: Convert to fraction form
    73,279.80/109,919.70 = 66,500.10/x
  3. Step 3: Cross multiply
    73,279.80x = 109,919.70 × 66,500.10
  4. Step 4: Simplify right side
    73,279.80x = 7,309,671,041.97
  5. Step 5: Solve for x
    x = 7,309,671,041.97/73,279.80
  6. Step 6: Final answer
    x = 99,750.15

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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.