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Finding the Fourth Proportional to 87,272, 130,908 and 28,113.68

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Solution

The fourth proportional to 87,272, 130,908 and 28,113.68 is: 42,170.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,272 : 130,908 = 28,113.68 : x
  2. Step 2: Convert to fraction form
    87,272/130,908 = 28,113.68/x
  3. Step 3: Cross multiply
    87,272x = 130,908 × 28,113.68
  4. Step 4: Simplify right side
    87,272x = 3,680,305,621.44
  5. Step 5: Solve for x
    x = 3,680,305,621.44/87,272
  6. Step 6: Final answer
    x = 42,170.52

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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.