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Finding the Fourth Proportional to 75,135, 112,741.38 and 38,199

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Solution

The fourth proportional to 75,135, 112,741.38 and 38,199 is: 57,318.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,135 : 112,741.38 = 38,199 : x
  2. Step 2: Convert to fraction form
    75,135/112,741.38 = 38,199/x
  3. Step 3: Cross multiply
    75,135x = 112,741.38 × 38,199
  4. Step 4: Simplify right side
    75,135x = 4,306,607,974.62
  5. Step 5: Solve for x
    x = 4,306,607,974.62/75,135
  6. Step 6: Final answer
    x = 57,318.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.