Home / 129,766.19-179,046.78-78,777.63

Finding the Fourth Proportional to 129,766.19, 179,046.78 and 78,777.63

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Solution

The fourth proportional to 129,766.19, 179,046.78 and 78,777.63 is: 108,694.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,766.19 : 179,046.78 = 78,777.63 : x
  2. Step 2: Convert to fraction form
    129,766.19/179,046.78 = 78,777.63/x
  3. Step 3: Cross multiply
    129,766.19x = 179,046.78 × 78,777.63
  4. Step 4: Simplify right side
    129,766.19x = 14,104,880,593.64
  5. Step 5: Solve for x
    x = 14,104,880,593.64/129,766.19
  6. Step 6: Final answer
    x = 108,694.58

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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.