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Finding the Fourth Proportional to 139,009.68, 191,834.06 and 75,346.92

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Solution

The fourth proportional to 139,009.68, 191,834.06 and 75,346.92 is: 103,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,009.68 : 191,834.06 = 75,346.92 : x
  2. Step 2: Convert to fraction form
    139,009.68/191,834.06 = 75,346.92/x
  3. Step 3: Cross multiply
    139,009.68x = 191,834.06 × 75,346.92
  4. Step 4: Simplify right side
    139,009.68x = 14,454,105,195.36
  5. Step 5: Solve for x
    x = 14,454,105,195.36/139,009.68
  6. Step 6: Final answer
    x = 103,979.13

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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.