Home / 139,947.40-193,120.13-79,509.66

Finding the Fourth Proportional to 139,947.40, 193,120.13 and 79,509.66

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Solution

The fourth proportional to 139,947.40, 193,120.13 and 79,509.66 is: 109,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,947.40 : 193,120.13 = 79,509.66 : x
  2. Step 2: Convert to fraction form
    139,947.40/193,120.13 = 79,509.66/x
  3. Step 3: Cross multiply
    139,947.40x = 193,120.13 × 79,509.66
  4. Step 4: Simplify right side
    139,947.40x = 15,354,914,902.79
  5. Step 5: Solve for x
    x = 15,354,914,902.79/139,947.40
  6. Step 6: Final answer
    x = 109,719.19

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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.