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Finding the Fourth Proportional to 138,988.76, 191,799.33 and 75,325.19

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Solution

The fourth proportional to 138,988.76, 191,799.33 and 75,325.19 is: 103,945.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,988.76 : 191,799.33 = 75,325.19 : x
  2. Step 2: Convert to fraction form
    138,988.76/191,799.33 = 75,325.19/x
  3. Step 3: Cross multiply
    138,988.76x = 191,799.33 × 75,325.19
  4. Step 4: Simplify right side
    138,988.76x = 14,447,319,732.66
  5. Step 5: Solve for x
    x = 14,447,319,732.66/138,988.76
  6. Step 6: Final answer
    x = 103,945.96

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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.