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Finding the Fourth Proportional to 87,009.70, 130,428.15 and 40,180.90

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Solution

The fourth proportional to 87,009.70, 130,428.15 and 40,180.90 is: 60,231.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,009.70 : 130,428.15 = 40,180.90 : x
  2. Step 2: Convert to fraction form
    87,009.70/130,428.15 = 40,180.90/x
  3. Step 3: Cross multiply
    87,009.70x = 130,428.15 × 40,180.90
  4. Step 4: Simplify right side
    87,009.70x = 5,240,720,452.34
  5. Step 5: Solve for x
    x = 5,240,720,452.34/87,009.70
  6. Step 6: Final answer
    x = 60,231.45

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1.5x scale

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.