Home / 128,113.20-192,169.80-45,007.20

Finding the Fourth Proportional to 128,113.20, 192,169.80 and 45,007.20

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Solution

The fourth proportional to 128,113.20, 192,169.80 and 45,007.20 is: 67,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,113.20 : 192,169.80 = 45,007.20 : x
  2. Step 2: Convert to fraction form
    128,113.20/192,169.80 = 45,007.20/x
  3. Step 3: Cross multiply
    128,113.20x = 192,169.80 × 45,007.20
  4. Step 4: Simplify right side
    128,113.20x = 8,649,024,622.56
  5. Step 5: Solve for x
    x = 8,649,024,622.56/128,113.20
  6. Step 6: Final answer
    x = 67,510.80

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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.