Home / 87,220.40-130,830.60-80,805.20

Finding the Fourth Proportional to 87,220.40, 130,830.60 and 80,805.20

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Solution

The fourth proportional to 87,220.40, 130,830.60 and 80,805.20 is: 121,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,220.40 : 130,830.60 = 80,805.20 : x
  2. Step 2: Convert to fraction form
    87,220.40/130,830.60 = 80,805.20/x
  3. Step 3: Cross multiply
    87,220.40x = 130,830.60 × 80,805.20
  4. Step 4: Simplify right side
    87,220.40x = 10,571,792,799.12
  5. Step 5: Solve for x
    x = 10,571,792,799.12/87,220.40
  6. Step 6: Final answer
    x = 121,207.80

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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.