Home / 138,927.12-191,648.92-87,853.78

Finding the Fourth Proportional to 138,927.12, 191,648.92 and 87,853.78

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Solution

The fourth proportional to 138,927.12, 191,648.92 and 87,853.78 is: 121,193.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,927.12 : 191,648.92 = 87,853.78 : x
  2. Step 2: Convert to fraction form
    138,927.12/191,648.92 = 87,853.78/x
  3. Step 3: Cross multiply
    138,927.12x = 191,648.92 × 87,853.78
  4. Step 4: Simplify right side
    138,927.12x = 16,837,082,054.92
  5. Step 5: Solve for x
    x = 16,837,082,054.92/138,927.12
  6. Step 6: Final answer
    x = 121,193.63

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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.