Home / 71,439.94-107,149.32-18,853.12

Finding the Fourth Proportional to 71,439.94, 107,149.32 and 18,853.12

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Solution

The fourth proportional to 71,439.94, 107,149.32 and 18,853.12 is: 28,276.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,439.94 : 107,149.32 = 18,853.12 : x
  2. Step 2: Convert to fraction form
    71,439.94/107,149.32 = 18,853.12/x
  3. Step 3: Cross multiply
    71,439.94x = 107,149.32 × 18,853.12
  4. Step 4: Simplify right side
    71,439.94x = 2,020,098,987.88
  5. Step 5: Solve for x
    x = 2,020,098,987.88/71,439.94
  6. Step 6: Final answer
    x = 28,276.89

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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.