Home / 138,452.40-191,065.05-78,023.97

Finding the Fourth Proportional to 138,452.40, 191,065.05 and 78,023.97

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Solution

The fourth proportional to 138,452.40, 191,065.05 and 78,023.97 is: 107,673.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,452.40 : 191,065.05 = 78,023.97 : x
  2. Step 2: Convert to fraction form
    138,452.40/191,065.05 = 78,023.97/x
  3. Step 3: Cross multiply
    138,452.40x = 191,065.05 × 78,023.97
  4. Step 4: Simplify right side
    138,452.40x = 14,907,653,729.25
  5. Step 5: Solve for x
    x = 14,907,653,729.25/138,452.40
  6. Step 6: Final answer
    x = 107,673.49

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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.