Home / 83,905.90-125,858.85-80,680.30

Finding the Fourth Proportional to 83,905.90, 125,858.85 and 80,680.30

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Solution

The fourth proportional to 83,905.90, 125,858.85 and 80,680.30 is: 121,020.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,905.90 : 125,858.85 = 80,680.30 : x
  2. Step 2: Convert to fraction form
    83,905.90/125,858.85 = 80,680.30/x
  3. Step 3: Cross multiply
    83,905.90x = 125,858.85 × 80,680.30
  4. Step 4: Simplify right side
    83,905.90x = 10,154,329,775.66
  5. Step 5: Solve for x
    x = 10,154,329,775.66/83,905.90
  6. Step 6: Final answer
    x = 121,020.45

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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.