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Finding the Fourth Proportional to 69,031.72, 103,395.80 and 57,049.70

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Solution

The fourth proportional to 69,031.72, 103,395.80 and 57,049.70 is: 85,449.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,031.72 : 103,395.80 = 57,049.70 : x
  2. Step 2: Convert to fraction form
    69,031.72/103,395.80 = 57,049.70/x
  3. Step 3: Cross multiply
    69,031.72x = 103,395.80 × 57,049.70
  4. Step 4: Simplify right side
    69,031.72x = 5,898,699,371.26
  5. Step 5: Solve for x
    x = 5,898,699,371.26/69,031.72
  6. Step 6: Final answer
    x = 85,449.11

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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.