Home / 129,780.54-179,096.85-72,416.34

Finding the Fourth Proportional to 129,780.54, 179,096.85 and 72,416.34

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Solution

The fourth proportional to 129,780.54, 179,096.85 and 72,416.34 is: 99,934.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.54 : 179,096.85 = 72,416.34 : x
  2. Step 2: Convert to fraction form
    129,780.54/179,096.85 = 72,416.34/x
  3. Step 3: Cross multiply
    129,780.54x = 179,096.85 × 72,416.34
  4. Step 4: Simplify right side
    129,780.54x = 12,969,538,382.53
  5. Step 5: Solve for x
    x = 12,969,538,382.53/129,780.54
  6. Step 6: Final answer
    x = 99,934.38

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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.