Home / 138,663.03-191,344.10-78,248.37

Finding the Fourth Proportional to 138,663.03, 191,344.10 and 78,248.37

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Solution

The fourth proportional to 138,663.03, 191,344.10 and 78,248.37 is: 107,976.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,663.03 : 191,344.10 = 78,248.37 : x
  2. Step 2: Convert to fraction form
    138,663.03/191,344.10 = 78,248.37/x
  3. Step 3: Cross multiply
    138,663.03x = 191,344.10 × 78,248.37
  4. Step 4: Simplify right side
    138,663.03x = 14,972,363,542.88
  5. Step 5: Solve for x
    x = 14,972,363,542.88/138,663.03
  6. Step 6: Final answer
    x = 107,976.61

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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.