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Finding the Fourth Proportional to 71,216.62, 98,278.31 and 39,384.83

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Solution

The fourth proportional to 71,216.62, 98,278.31 and 39,384.83 is: 54,350.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,216.62 : 98,278.31 = 39,384.83 : x
  2. Step 2: Convert to fraction form
    71,216.62/98,278.31 = 39,384.83/x
  3. Step 3: Cross multiply
    71,216.62x = 98,278.31 × 39,384.83
  4. Step 4: Simplify right side
    71,216.62x = 3,870,674,876.20
  5. Step 5: Solve for x
    x = 3,870,674,876.20/71,216.62
  6. Step 6: Final answer
    x = 54,350.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.