Home / 138,521.39-191,189.24-87,501.66

Finding the Fourth Proportional to 138,521.39, 191,189.24 and 87,501.66

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Solution

The fourth proportional to 138,521.39, 191,189.24 and 87,501.66 is: 120,771.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,521.39 : 191,189.24 = 87,501.66 : x
  2. Step 2: Convert to fraction form
    138,521.39/191,189.24 = 87,501.66/x
  3. Step 3: Cross multiply
    138,521.39x = 191,189.24 × 87,501.66
  4. Step 4: Simplify right side
    138,521.39x = 16,729,375,436.63
  5. Step 5: Solve for x
    x = 16,729,375,436.63/138,521.39
  6. Step 6: Final answer
    x = 120,771.07

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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.