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Finding the Fourth Proportional to 87,016.80, 130,525.20 and 81,832.80

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Solution

The fourth proportional to 87,016.80, 130,525.20 and 81,832.80 is: 122,749.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,016.80 : 130,525.20 = 81,832.80 : x
  2. Step 2: Convert to fraction form
    87,016.80/130,525.20 = 81,832.80/x
  3. Step 3: Cross multiply
    87,016.80x = 130,525.20 × 81,832.80
  4. Step 4: Simplify right side
    87,016.80x = 10,681,242,586.56
  5. Step 5: Solve for x
    x = 10,681,242,586.56/87,016.80
  6. Step 6: Final answer
    x = 122,749.20

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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.