Home / 129,000.20-193,500.30-87,009.80

Finding the Fourth Proportional to 129,000.20, 193,500.30 and 87,009.80

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Solution

The fourth proportional to 129,000.20, 193,500.30 and 87,009.80 is: 130,514.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,000.20 : 193,500.30 = 87,009.80 : x
  2. Step 2: Convert to fraction form
    129,000.20/193,500.30 = 87,009.80/x
  3. Step 3: Cross multiply
    129,000.20x = 193,500.30 × 87,009.80
  4. Step 4: Simplify right side
    129,000.20x = 16,836,422,402.94
  5. Step 5: Solve for x
    x = 16,836,422,402.94/129,000.20
  6. Step 6: Final answer
    x = 130,514.70

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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.