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Finding the Fourth Proportional to 71,639.70, 107,459.55 and 49,521.30

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Solution

The fourth proportional to 71,639.70, 107,459.55 and 49,521.30 is: 74,281.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,639.70 : 107,459.55 = 49,521.30 : x
  2. Step 2: Convert to fraction form
    71,639.70/107,459.55 = 49,521.30/x
  3. Step 3: Cross multiply
    71,639.70x = 107,459.55 × 49,521.30
  4. Step 4: Simplify right side
    71,639.70x = 5,321,536,613.42
  5. Step 5: Solve for x
    x = 5,321,536,613.42/71,639.70
  6. Step 6: Final answer
    x = 74,281.95

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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.