Home / 80,880.12-121,320.18-45,747.18

Finding the Fourth Proportional to 80,880.12, 121,320.18 and 45,747.18

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Solution

The fourth proportional to 80,880.12, 121,320.18 and 45,747.18 is: 68,620.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,880.12 : 121,320.18 = 45,747.18 : x
  2. Step 2: Convert to fraction form
    80,880.12/121,320.18 = 45,747.18/x
  3. Step 3: Cross multiply
    80,880.12x = 121,320.18 × 45,747.18
  4. Step 4: Simplify right side
    80,880.12x = 5,550,056,112.09
  5. Step 5: Solve for x
    x = 5,550,056,112.09/80,880.12
  6. Step 6: Final answer
    x = 68,620.77

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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.