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Finding the Fourth Proportional to 84,819.80, 127,229.70 and 77,043.80

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Solution

The fourth proportional to 84,819.80, 127,229.70 and 77,043.80 is: 115,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,819.80 : 127,229.70 = 77,043.80 : x
  2. Step 2: Convert to fraction form
    84,819.80/127,229.70 = 77,043.80/x
  3. Step 3: Cross multiply
    84,819.80x = 127,229.70 × 77,043.80
  4. Step 4: Simplify right side
    84,819.80x = 9,802,259,560.86
  5. Step 5: Solve for x
    x = 9,802,259,560.86/84,819.80
  6. Step 6: Final answer
    x = 115,565.70

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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.