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Finding the Fourth Proportional to 87,274, 130,911 and 28,115.68

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Solution

The fourth proportional to 87,274, 130,911 and 28,115.68 is: 42,173.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,274 : 130,911 = 28,115.68 : x
  2. Step 2: Convert to fraction form
    87,274/130,911 = 28,115.68/x
  3. Step 3: Cross multiply
    87,274x = 130,911 × 28,115.68
  4. Step 4: Simplify right side
    87,274x = 3,680,651,784.48
  5. Step 5: Solve for x
    x = 3,680,651,784.48/87,274
  6. Step 6: Final answer
    x = 42,173.52

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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.