Home / 138,734.46-191,463.75-78,310.49

Finding the Fourth Proportional to 138,734.46, 191,463.75 and 78,310.49

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Solution

The fourth proportional to 138,734.46, 191,463.75 and 78,310.49 is: 108,074.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,734.46 : 191,463.75 = 78,310.49 : x
  2. Step 2: Convert to fraction form
    138,734.46/191,463.75 = 78,310.49/x
  3. Step 3: Cross multiply
    138,734.46x = 191,463.75 × 78,310.49
  4. Step 4: Simplify right side
    138,734.46x = 14,993,619,122.42
  5. Step 5: Solve for x
    x = 14,993,619,122.42/138,734.46
  6. Step 6: Final answer
    x = 108,074.22

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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.