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Finding the Fourth Proportional to 138,900.67, 191,508.67 and 113,381.11

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Solution

The fourth proportional to 138,900.67, 191,508.67 and 113,381.11 is: 156,323.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,900.67 : 191,508.67 = 113,381.11 : x
  2. Step 2: Convert to fraction form
    138,900.67/191,508.67 = 113,381.11/x
  3. Step 3: Cross multiply
    138,900.67x = 191,508.67 × 113,381.11
  4. Step 4: Simplify right side
    138,900.67x = 21,713,465,579.22
  5. Step 5: Solve for x
    x = 21,713,465,579.22/138,900.67
  6. Step 6: Final answer
    x = 156,323.69

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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.