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Finding the Fourth Proportional to 72,425.10, 108,643.05 and 25,671.90

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Solution

The fourth proportional to 72,425.10, 108,643.05 and 25,671.90 is: 38,509.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425.10 : 108,643.05 = 25,671.90 : x
  2. Step 2: Convert to fraction form
    72,425.10/108,643.05 = 25,671.90/x
  3. Step 3: Cross multiply
    72,425.10x = 108,643.05 × 25,671.90
  4. Step 4: Simplify right side
    72,425.10x = 2,789,073,515.30
  5. Step 5: Solve for x
    x = 2,789,073,515.30/72,425.10
  6. Step 6: Final answer
    x = 38,509.76

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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.