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Finding the Fourth Proportional to 85,296.70, 127,932.90 and 29,139.40

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Solution

The fourth proportional to 85,296.70, 127,932.90 and 29,139.40 is: 43,704.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,296.70 : 127,932.90 = 29,139.40 : x
  2. Step 2: Convert to fraction form
    85,296.70/127,932.90 = 29,139.40/x
  3. Step 3: Cross multiply
    85,296.70x = 127,932.90 × 29,139.40
  4. Step 4: Simplify right side
    85,296.70x = 3,727,887,946.26
  5. Step 5: Solve for x
    x = 3,727,887,946.26/85,296.70
  6. Step 6: Final answer
    x = 43,704.95

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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.