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Finding the Fourth Proportional to 145,082.80, 217,624.20 and 82,759.60

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Solution

The fourth proportional to 145,082.80, 217,624.20 and 82,759.60 is: 124,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,082.80 : 217,624.20 = 82,759.60 : x
  2. Step 2: Convert to fraction form
    145,082.80/217,624.20 = 82,759.60/x
  3. Step 3: Cross multiply
    145,082.80x = 217,624.20 × 82,759.60
  4. Step 4: Simplify right side
    145,082.80x = 18,010,491,742.32
  5. Step 5: Solve for x
    x = 18,010,491,742.32/145,082.80
  6. Step 6: Final answer
    x = 124,139.40

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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.