Home / 138,944.39-191,590.99-90,456.84

Finding the Fourth Proportional to 138,944.39, 191,590.99 and 90,456.84

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Solution

The fourth proportional to 138,944.39, 191,590.99 and 90,456.84 is: 124,731.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,944.39 : 191,590.99 = 90,456.84 : x
  2. Step 2: Convert to fraction form
    138,944.39/191,590.99 = 90,456.84/x
  3. Step 3: Cross multiply
    138,944.39x = 191,590.99 × 90,456.84
  4. Step 4: Simplify right side
    138,944.39x = 17,330,715,301.73
  5. Step 5: Solve for x
    x = 17,330,715,301.73/138,944.39
  6. Step 6: Final answer
    x = 124,731.31

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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.