Home / 186,331.19-278,638.38-138,390.39

Finding the Fourth Proportional to 186,331.19, 278,638.38 and 138,390.39

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Solution

The fourth proportional to 186,331.19, 278,638.38 and 138,390.39 is: 206,948.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,331.19 : 278,638.38 = 138,390.39 : x
  2. Step 2: Convert to fraction form
    186,331.19/278,638.38 = 138,390.39/x
  3. Step 3: Cross multiply
    186,331.19x = 278,638.38 × 138,390.39
  4. Step 4: Simplify right side
    186,331.19x = 38,560,874,077.17
  5. Step 5: Solve for x
    x = 38,560,874,077.17/186,331.19
  6. Step 6: Final answer
    x = 206,948.04

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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.