Home / 129,335.20-193,887.60-76,688.80

Finding the Fourth Proportional to 129,335.20, 193,887.60 and 76,688.80

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Solution

The fourth proportional to 129,335.20, 193,887.60 and 76,688.80 is: 114,964.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,335.20 : 193,887.60 = 76,688.80 : x
  2. Step 2: Convert to fraction form
    129,335.20/193,887.60 = 76,688.80/x
  3. Step 3: Cross multiply
    129,335.20x = 193,887.60 × 76,688.80
  4. Step 4: Simplify right side
    129,335.20x = 14,869,007,378.88
  5. Step 5: Solve for x
    x = 14,869,007,378.88/129,335.20
  6. Step 6: Final answer
    x = 114,964.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.