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Finding the Fourth Proportional to 84,711.40, 127,067.10 and 67,085.80

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Solution

The fourth proportional to 84,711.40, 127,067.10 and 67,085.80 is: 100,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,711.40 : 127,067.10 = 67,085.80 : x
  2. Step 2: Convert to fraction form
    84,711.40/127,067.10 = 67,085.80/x
  3. Step 3: Cross multiply
    84,711.40x = 127,067.10 × 67,085.80
  4. Step 4: Simplify right side
    84,711.40x = 8,524,398,057.18
  5. Step 5: Solve for x
    x = 8,524,398,057.18/84,711.40
  6. Step 6: Final answer
    x = 100,628.70

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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.