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Finding the Fourth Proportional to 79,744.60, 119,616.90 and 66,719.80

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Solution

The fourth proportional to 79,744.60, 119,616.90 and 66,719.80 is: 100,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,744.60 : 119,616.90 = 66,719.80 : x
  2. Step 2: Convert to fraction form
    79,744.60/119,616.90 = 66,719.80/x
  3. Step 3: Cross multiply
    79,744.60x = 119,616.90 × 66,719.80
  4. Step 4: Simplify right side
    79,744.60x = 7,980,815,644.62
  5. Step 5: Solve for x
    x = 7,980,815,644.62/79,744.60
  6. Step 6: Final answer
    x = 100,079.70

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1.5x scale

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.