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Finding the Fourth Proportional to 139,010.18, 191,834.75 and 75,347.42

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Solution

The fourth proportional to 139,010.18, 191,834.75 and 75,347.42 is: 103,979.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.18 : 191,834.75 = 75,347.42 : x
  2. Step 2: Convert to fraction form
    139,010.18/191,834.75 = 75,347.42/x
  3. Step 3: Cross multiply
    139,010.18x = 191,834.75 × 75,347.42
  4. Step 4: Simplify right side
    139,010.18x = 14,454,253,102.11
  5. Step 5: Solve for x
    x = 14,454,253,102.11/139,010.18
  6. Step 6: Final answer
    x = 103,979.82

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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.