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Finding the Fourth Proportional to 71,589.96, 98,796 and 39,760.20

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Solution

The fourth proportional to 71,589.96, 98,796 and 39,760.20 is: 54,870.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,589.96 : 98,796 = 39,760.20 : x
  2. Step 2: Convert to fraction form
    71,589.96/98,796 = 39,760.20/x
  3. Step 3: Cross multiply
    71,589.96x = 98,796 × 39,760.20
  4. Step 4: Simplify right side
    71,589.96x = 3,928,148,719.20
  5. Step 5: Solve for x
    x = 3,928,148,719.20/71,589.96
  6. Step 6: Final answer
    x = 54,870.11

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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.