Home / 138,733.16-191,452.41-78,306.35

Finding the Fourth Proportional to 138,733.16, 191,452.41 and 78,306.35

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Solution

The fourth proportional to 138,733.16, 191,452.41 and 78,306.35 is: 108,063.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,733.16 : 191,452.41 = 78,306.35 : x
  2. Step 2: Convert to fraction form
    138,733.16/191,452.41 = 78,306.35/x
  3. Step 3: Cross multiply
    138,733.16x = 191,452.41 × 78,306.35
  4. Step 4: Simplify right side
    138,733.16x = 14,991,938,468.54
  5. Step 5: Solve for x
    x = 14,991,938,468.54/138,733.16
  6. Step 6: Final answer
    x = 108,063.13

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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.