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Finding the Fourth Proportional to 139,010.10, 191,834.13 and 75,347.88

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Solution

The fourth proportional to 139,010.10, 191,834.13 and 75,347.88 is: 103,980.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.10 : 191,834.13 = 75,347.88 : x
  2. Step 2: Convert to fraction form
    139,010.10/191,834.13 = 75,347.88/x
  3. Step 3: Cross multiply
    139,010.10x = 191,834.13 × 75,347.88
  4. Step 4: Simplify right side
    139,010.10x = 14,454,295,007.14
  5. Step 5: Solve for x
    x = 14,454,295,007.14/139,010.10
  6. Step 6: Final answer
    x = 103,980.18

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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.