Home / 129,861.72-179,180.70-84,534.84

Finding the Fourth Proportional to 129,861.72, 179,180.70 and 84,534.84

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Solution

The fourth proportional to 129,861.72, 179,180.70 and 84,534.84 is: 116,639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,861.72 : 179,180.70 = 84,534.84 : x
  2. Step 2: Convert to fraction form
    129,861.72/179,180.70 = 84,534.84/x
  3. Step 3: Cross multiply
    129,861.72x = 179,180.70 × 84,534.84
  4. Step 4: Simplify right side
    129,861.72x = 15,147,011,805.59
  5. Step 5: Solve for x
    x = 15,147,011,805.59/129,861.72
  6. Step 6: Final answer
    x = 116,639.54

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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.