Home / 138,981.11-191,794.09-75,318.90

Finding the Fourth Proportional to 138,981.11, 191,794.09 and 75,318.90

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Solution

The fourth proportional to 138,981.11, 191,794.09 and 75,318.90 is: 103,940.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,981.11 : 191,794.09 = 75,318.90 : x
  2. Step 2: Convert to fraction form
    138,981.11/191,794.09 = 75,318.90/x
  3. Step 3: Cross multiply
    138,981.11x = 191,794.09 × 75,318.90
  4. Step 4: Simplify right side
    138,981.11x = 14,445,719,885.30
  5. Step 5: Solve for x
    x = 14,445,719,885.30/138,981.11
  6. Step 6: Final answer
    x = 103,940.17

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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.