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Finding the Fourth Proportional to 80,880.48, 112,048.20 and 78,945.12

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Solution

The fourth proportional to 80,880.48, 112,048.20 and 78,945.12 is: 109,367.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,880.48 : 112,048.20 = 78,945.12 : x
  2. Step 2: Convert to fraction form
    80,880.48/112,048.20 = 78,945.12/x
  3. Step 3: Cross multiply
    80,880.48x = 112,048.20 × 78,945.12
  4. Step 4: Simplify right side
    80,880.48x = 8,845,658,594.78
  5. Step 5: Solve for x
    x = 8,845,658,594.78/80,880.48
  6. Step 6: Final answer
    x = 109,367.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.