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Finding the Fourth Proportional to 87,331.20, 130,996.80 and 31,948.80

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Solution

The fourth proportional to 87,331.20, 130,996.80 and 31,948.80 is: 47,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,331.20 : 130,996.80 = 31,948.80 : x
  2. Step 2: Convert to fraction form
    87,331.20/130,996.80 = 31,948.80/x
  3. Step 3: Cross multiply
    87,331.20x = 130,996.80 × 31,948.80
  4. Step 4: Simplify right side
    87,331.20x = 4,185,190,563.84
  5. Step 5: Solve for x
    x = 4,185,190,563.84/87,331.20
  6. Step 6: Final answer
    x = 47,923.20

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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.