Home / 129,154.32-178,232.79-71,791.86

Finding the Fourth Proportional to 129,154.32, 178,232.79 and 71,791.86

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Solution

The fourth proportional to 129,154.32, 178,232.79 and 71,791.86 is: 99,072.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,154.32 : 178,232.79 = 71,791.86 : x
  2. Step 2: Convert to fraction form
    129,154.32/178,232.79 = 71,791.86/x
  3. Step 3: Cross multiply
    129,154.32x = 178,232.79 × 71,791.86
  4. Step 4: Simplify right side
    129,154.32x = 12,795,663,507.09
  5. Step 5: Solve for x
    x = 12,795,663,507.09/129,154.32
  6. Step 6: Final answer
    x = 99,072.67

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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.