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Finding the Fourth Proportional to 80,967.20, 121,450.80 and 77,856.80

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Solution

The fourth proportional to 80,967.20, 121,450.80 and 77,856.80 is: 116,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,967.20 : 121,450.80 = 77,856.80 : x
  2. Step 2: Convert to fraction form
    80,967.20/121,450.80 = 77,856.80/x
  3. Step 3: Cross multiply
    80,967.20x = 121,450.80 × 77,856.80
  4. Step 4: Simplify right side
    80,967.20x = 9,455,770,645.44
  5. Step 5: Solve for x
    x = 9,455,770,645.44/80,967.20
  6. Step 6: Final answer
    x = 116,785.20

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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.