Home / 128,145.66-192,198.78-42,758.04

Finding the Fourth Proportional to 128,145.66, 192,198.78 and 42,758.04

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Solution

The fourth proportional to 128,145.66, 192,198.78 and 42,758.04 is: 64,130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.66 : 192,198.78 = 42,758.04 : x
  2. Step 2: Convert to fraction form
    128,145.66/192,198.78 = 42,758.04/x
  3. Step 3: Cross multiply
    128,145.66x = 192,198.78 × 42,758.04
  4. Step 4: Simplify right side
    128,145.66x = 8,218,043,123.19
  5. Step 5: Solve for x
    x = 8,218,043,123.19/128,145.66
  6. Step 6: Final answer
    x = 64,130.48

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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.