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Finding the Fourth Proportional to 72,686.74, 109,026.84 and 25,335.22

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Solution

The fourth proportional to 72,686.74, 109,026.84 and 25,335.22 is: 38,001.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,686.74 : 109,026.84 = 25,335.22 : x
  2. Step 2: Convert to fraction form
    72,686.74/109,026.84 = 25,335.22/x
  3. Step 3: Cross multiply
    72,686.74x = 109,026.84 × 25,335.22
  4. Step 4: Simplify right side
    72,686.74x = 2,762,218,977.30
  5. Step 5: Solve for x
    x = 2,762,218,977.30/72,686.74
  6. Step 6: Final answer
    x = 38,001.69

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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.