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Finding the Fourth Proportional to 71,515.80, 107,273.70 and 54,959.40

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Solution

The fourth proportional to 71,515.80, 107,273.70 and 54,959.40 is: 82,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,515.80 : 107,273.70 = 54,959.40 : x
  2. Step 2: Convert to fraction form
    71,515.80/107,273.70 = 54,959.40/x
  3. Step 3: Cross multiply
    71,515.80x = 107,273.70 × 54,959.40
  4. Step 4: Simplify right side
    71,515.80x = 5,895,698,187.78
  5. Step 5: Solve for x
    x = 5,895,698,187.78/71,515.80
  6. Step 6: Final answer
    x = 82,439.10

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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.