Home / 128,278.16-192,206.89-90,654.47

Finding the Fourth Proportional to 128,278.16, 192,206.89 and 90,654.47

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Solution

The fourth proportional to 128,278.16, 192,206.89 and 90,654.47 is: 135,833.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.16 : 192,206.89 = 90,654.47 : x
  2. Step 2: Convert to fraction form
    128,278.16/192,206.89 = 90,654.47/x
  3. Step 3: Cross multiply
    128,278.16x = 192,206.89 × 90,654.47
  4. Step 4: Simplify right side
    128,278.16x = 17,424,413,743.30
  5. Step 5: Solve for x
    x = 17,424,413,743.30/128,278.16
  6. Step 6: Final answer
    x = 135,833.05

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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.