Home / 128,212.14-192,357.10-90,844.42

Finding the Fourth Proportional to 128,212.14, 192,357.10 and 90,844.42

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Solution

The fourth proportional to 128,212.14, 192,357.10 and 90,844.42 is: 136,294.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,212.14 : 192,357.10 = 90,844.42 : x
  2. Step 2: Convert to fraction form
    128,212.14/192,357.10 = 90,844.42/x
  3. Step 3: Cross multiply
    128,212.14x = 192,357.10 × 90,844.42
  4. Step 4: Simplify right side
    128,212.14x = 17,474,569,182.38
  5. Step 5: Solve for x
    x = 17,474,569,182.38/128,212.14
  6. Step 6: Final answer
    x = 136,294.19

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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.