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Finding the Fourth Proportional to 72,422.10, 108,643.95 and 25,671.30

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Solution

The fourth proportional to 72,422.10, 108,643.95 and 25,671.30 is: 38,510.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,422.10 : 108,643.95 = 25,671.30 : x
  2. Step 2: Convert to fraction form
    72,422.10/108,643.95 = 25,671.30/x
  3. Step 3: Cross multiply
    72,422.10x = 108,643.95 × 25,671.30
  4. Step 4: Simplify right side
    72,422.10x = 2,789,031,433.64
  5. Step 5: Solve for x
    x = 2,789,031,433.64/72,422.10
  6. Step 6: Final answer
    x = 38,510.78

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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.