Home / 129,757.28-179,034.48-78,768.76

Finding the Fourth Proportional to 129,757.28, 179,034.48 and 78,768.76

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Solution

The fourth proportional to 129,757.28, 179,034.48 and 78,768.76 is: 108,682.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.28 : 179,034.48 = 78,768.76 : x
  2. Step 2: Convert to fraction form
    129,757.28/179,034.48 = 78,768.76/x
  3. Step 3: Cross multiply
    129,757.28x = 179,034.48 × 78,768.76
  4. Step 4: Simplify right side
    129,757.28x = 14,102,323,986.84
  5. Step 5: Solve for x
    x = 14,102,323,986.84/129,757.28
  6. Step 6: Final answer
    x = 108,682.33

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1.5x scale

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.