Home / 80,998.90-121,498.35-51,255.70

Finding the Fourth Proportional to 80,998.90, 121,498.35 and 51,255.70

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Solution

The fourth proportional to 80,998.90, 121,498.35 and 51,255.70 is: 76,883.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.90 : 121,498.35 = 51,255.70 : x
  2. Step 2: Convert to fraction form
    80,998.90/121,498.35 = 51,255.70/x
  3. Step 3: Cross multiply
    80,998.90x = 121,498.35 × 51,255.70
  4. Step 4: Simplify right side
    80,998.90x = 6,227,482,978.10
  5. Step 5: Solve for x
    x = 6,227,482,978.10/80,998.90
  6. Step 6: Final answer
    x = 76,883.55

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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.