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Finding the Fourth Proportional to 128,249.87, 177,098.30 and 79,934.26

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Solution

The fourth proportional to 128,249.87, 177,098.30 and 79,934.26 is: 110,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,249.87 : 177,098.30 = 79,934.26 : x
  2. Step 2: Convert to fraction form
    128,249.87/177,098.30 = 79,934.26/x
  3. Step 3: Cross multiply
    128,249.87x = 177,098.30 × 79,934.26
  4. Step 4: Simplify right side
    128,249.87x = 14,156,221,557.76
  5. Step 5: Solve for x
    x = 14,156,221,557.76/128,249.87
  6. Step 6: Final answer
    x = 110,380.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.