Home / 87,320.80-130,981.20-21,656.80

Finding the Fourth Proportional to 87,320.80, 130,981.20 and 21,656.80

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Solution

The fourth proportional to 87,320.80, 130,981.20 and 21,656.80 is: 32,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,320.80 : 130,981.20 = 21,656.80 : x
  2. Step 2: Convert to fraction form
    87,320.80/130,981.20 = 21,656.80/x
  3. Step 3: Cross multiply
    87,320.80x = 130,981.20 × 21,656.80
  4. Step 4: Simplify right side
    87,320.80x = 2,836,633,652.16
  5. Step 5: Solve for x
    x = 2,836,633,652.16/87,320.80
  6. Step 6: Final answer
    x = 32,485.20

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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.