Home / 128,002.40-192,003.60-120,744.80

Finding the Fourth Proportional to 128,002.40, 192,003.60 and 120,744.80

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Solution

The fourth proportional to 128,002.40, 192,003.60 and 120,744.80 is: 181,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.40 : 192,003.60 = 120,744.80 : x
  2. Step 2: Convert to fraction form
    128,002.40/192,003.60 = 120,744.80/x
  3. Step 3: Cross multiply
    128,002.40x = 192,003.60 × 120,744.80
  4. Step 4: Simplify right side
    128,002.40x = 23,183,436,281.28
  5. Step 5: Solve for x
    x = 23,183,436,281.28/128,002.40
  6. Step 6: Final answer
    x = 181,117.20

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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.