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Finding the Fourth Proportional to 80,689.68, 111,324.42 and 57,700.08

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Solution

The fourth proportional to 80,689.68, 111,324.42 and 57,700.08 is: 79,606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,689.68 : 111,324.42 = 57,700.08 : x
  2. Step 2: Convert to fraction form
    80,689.68/111,324.42 = 57,700.08/x
  3. Step 3: Cross multiply
    80,689.68x = 111,324.42 × 57,700.08
  4. Step 4: Simplify right side
    80,689.68x = 6,423,427,939.95
  5. Step 5: Solve for x
    x = 6,423,427,939.95/80,689.68
  6. Step 6: Final answer
    x = 79,606.56

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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.