Home / 138,822.12-208,340.14-72,279

Finding the Fourth Proportional to 138,822.12, 208,340.14 and 72,279

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Solution

The fourth proportional to 138,822.12, 208,340.14 and 72,279 is: 108,474.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,822.12 : 208,340.14 = 72,279 : x
  2. Step 2: Convert to fraction form
    138,822.12/208,340.14 = 72,279/x
  3. Step 3: Cross multiply
    138,822.12x = 208,340.14 × 72,279
  4. Step 4: Simplify right side
    138,822.12x = 15,058,616,979.06
  5. Step 5: Solve for x
    x = 15,058,616,979.06/138,822.12
  6. Step 6: Final answer
    x = 108,474.19

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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.