Home / 138,469.28-191,098.84-78,044.02

Finding the Fourth Proportional to 138,469.28, 191,098.84 and 78,044.02

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Solution

The fourth proportional to 138,469.28, 191,098.84 and 78,044.02 is: 107,707.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,469.28 : 191,098.84 = 78,044.02 : x
  2. Step 2: Convert to fraction form
    138,469.28/191,098.84 = 78,044.02/x
  3. Step 3: Cross multiply
    138,469.28x = 191,098.84 × 78,044.02
  4. Step 4: Simplify right side
    138,469.28x = 14,914,121,690.94
  5. Step 5: Solve for x
    x = 14,914,121,690.94/138,469.28
  6. Step 6: Final answer
    x = 107,707.08

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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.