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Finding the Fourth Proportional to 67,660.80, 101,491.20 and 66,278.40

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Solution

The fourth proportional to 67,660.80, 101,491.20 and 66,278.40 is: 99,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,660.80 : 101,491.20 = 66,278.40 : x
  2. Step 2: Convert to fraction form
    67,660.80/101,491.20 = 66,278.40/x
  3. Step 3: Cross multiply
    67,660.80x = 101,491.20 × 66,278.40
  4. Step 4: Simplify right side
    67,660.80x = 6,726,674,350.08
  5. Step 5: Solve for x
    x = 6,726,674,350.08/67,660.80
  6. Step 6: Final answer
    x = 99,417.60

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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.