Home / 138,969.48-191,778.04-75,306.72

Finding the Fourth Proportional to 138,969.48, 191,778.04 and 75,306.72

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Solution

The fourth proportional to 138,969.48, 191,778.04 and 75,306.72 is: 103,923.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,969.48 : 191,778.04 = 75,306.72 : x
  2. Step 2: Convert to fraction form
    138,969.48/191,778.04 = 75,306.72/x
  3. Step 3: Cross multiply
    138,969.48x = 191,778.04 × 75,306.72
  4. Step 4: Simplify right side
    138,969.48x = 14,442,175,160.43
  5. Step 5: Solve for x
    x = 14,442,175,160.43/138,969.48
  6. Step 6: Final answer
    x = 103,923.36

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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.