Home / 128,025.20-192,037.80-88,108.40

Finding the Fourth Proportional to 128,025.20, 192,037.80 and 88,108.40

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Solution

The fourth proportional to 128,025.20, 192,037.80 and 88,108.40 is: 132,162.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,025.20 : 192,037.80 = 88,108.40 : x
  2. Step 2: Convert to fraction form
    128,025.20/192,037.80 = 88,108.40/x
  3. Step 3: Cross multiply
    128,025.20x = 192,037.80 × 88,108.40
  4. Step 4: Simplify right side
    128,025.20x = 16,920,143,297.52
  5. Step 5: Solve for x
    x = 16,920,143,297.52/128,025.20
  6. Step 6: Final answer
    x = 132,162.60

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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.