Home / 80,945.40-121,418.10-77,446.20

Finding the Fourth Proportional to 80,945.40, 121,418.10 and 77,446.20

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Solution

The fourth proportional to 80,945.40, 121,418.10 and 77,446.20 is: 116,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,945.40 : 121,418.10 = 77,446.20 : x
  2. Step 2: Convert to fraction form
    80,945.40/121,418.10 = 77,446.20/x
  3. Step 3: Cross multiply
    80,945.40x = 121,418.10 × 77,446.20
  4. Step 4: Simplify right side
    80,945.40x = 9,403,370,456.22
  5. Step 5: Solve for x
    x = 9,403,370,456.22/80,945.40
  6. Step 6: Final answer
    x = 116,169.30

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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.