Home / 128,822.80-193,234.20-87,043.60

Finding the Fourth Proportional to 128,822.80, 193,234.20 and 87,043.60

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Solution

The fourth proportional to 128,822.80, 193,234.20 and 87,043.60 is: 130,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,822.80 : 193,234.20 = 87,043.60 : x
  2. Step 2: Convert to fraction form
    128,822.80/193,234.20 = 87,043.60/x
  3. Step 3: Cross multiply
    128,822.80x = 193,234.20 × 87,043.60
  4. Step 4: Simplify right side
    128,822.80x = 16,819,800,411.12
  5. Step 5: Solve for x
    x = 16,819,800,411.12/128,822.80
  6. Step 6: Final answer
    x = 130,565.40

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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.