Home / 139,947.15-193,119.78-79,509.41

Finding the Fourth Proportional to 139,947.15, 193,119.78 and 79,509.41

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Solution

The fourth proportional to 139,947.15, 193,119.78 and 79,509.41 is: 109,718.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,947.15 : 193,119.78 = 79,509.41 : x
  2. Step 2: Convert to fraction form
    139,947.15/193,119.78 = 79,509.41/x
  3. Step 3: Cross multiply
    139,947.15x = 193,119.78 × 79,509.41
  4. Step 4: Simplify right side
    139,947.15x = 15,354,839,767.13
  5. Step 5: Solve for x
    x = 15,354,839,767.13/139,947.15
  6. Step 6: Final answer
    x = 109,718.85

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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.