Home / 138,523.36-191,167.86-78,096.28

Finding the Fourth Proportional to 138,523.36, 191,167.86 and 78,096.28

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Solution

The fourth proportional to 138,523.36, 191,167.86 and 78,096.28 is: 107,776.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,523.36 : 191,167.86 = 78,096.28 : x
  2. Step 2: Convert to fraction form
    138,523.36/191,167.86 = 78,096.28/x
  3. Step 3: Cross multiply
    138,523.36x = 191,167.86 × 78,096.28
  4. Step 4: Simplify right side
    138,523.36x = 14,929,498,721.56
  5. Step 5: Solve for x
    x = 14,929,498,721.56/138,523.36
  6. Step 6: Final answer
    x = 107,776.04

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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.