Home / 128,088.20-192,002.70-75,470.60

Finding the Fourth Proportional to 128,088.20, 192,002.70 and 75,470.60

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Solution

The fourth proportional to 128,088.20, 192,002.70 and 75,470.60 is: 113,129.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,088.20 : 192,002.70 = 75,470.60 : x
  2. Step 2: Convert to fraction form
    128,088.20/192,002.70 = 75,470.60/x
  3. Step 3: Cross multiply
    128,088.20x = 192,002.70 × 75,470.60
  4. Step 4: Simplify right side
    128,088.20x = 14,490,558,970.62
  5. Step 5: Solve for x
    x = 14,490,558,970.62/128,088.20
  6. Step 6: Final answer
    x = 113,129.54

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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.