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Finding the Fourth Proportional to 87,181.28, 130,771.00 and 28,017

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Solution

The fourth proportional to 87,181.28, 130,771.00 and 28,017 is: 42,025.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,181.28 : 130,771.00 = 28,017 : x
  2. Step 2: Convert to fraction form
    87,181.28/130,771.00 = 28,017/x
  3. Step 3: Cross multiply
    87,181.28x = 130,771.00 × 28,017
  4. Step 4: Simplify right side
    87,181.28x = 3,663,810,966.92
  5. Step 5: Solve for x
    x = 3,663,810,966.92/87,181.28
  6. Step 6: Final answer
    x = 42,025.21

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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.