Home / 80,939.40-121,409.10-52,945.80

Finding the Fourth Proportional to 80,939.40, 121,409.10 and 52,945.80

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Solution

The fourth proportional to 80,939.40, 121,409.10 and 52,945.80 is: 79,418.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,939.40 : 121,409.10 = 52,945.80 : x
  2. Step 2: Convert to fraction form
    80,939.40/121,409.10 = 52,945.80/x
  3. Step 3: Cross multiply
    80,939.40x = 121,409.10 × 52,945.80
  4. Step 4: Simplify right side
    80,939.40x = 6,428,101,926.78
  5. Step 5: Solve for x
    x = 6,428,101,926.78/80,939.40
  6. Step 6: Final answer
    x = 79,418.70

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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.