Home / 138,723.85-191,439.56-78,297.04

Finding the Fourth Proportional to 138,723.85, 191,439.56 and 78,297.04

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Solution

The fourth proportional to 138,723.85, 191,439.56 and 78,297.04 is: 108,050.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,723.85 : 191,439.56 = 78,297.04 : x
  2. Step 2: Convert to fraction form
    138,723.85/191,439.56 = 78,297.04/x
  3. Step 3: Cross multiply
    138,723.85x = 191,439.56 × 78,297.04
  4. Step 4: Simplify right side
    138,723.85x = 14,989,150,886.90
  5. Step 5: Solve for x
    x = 14,989,150,886.90/138,723.85
  6. Step 6: Final answer
    x = 108,050.28

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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.