Home / 128,106.20-192,159.30-45,000.20

Finding the Fourth Proportional to 128,106.20, 192,159.30 and 45,000.20

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Solution

The fourth proportional to 128,106.20, 192,159.30 and 45,000.20 is: 67,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,106.20 : 192,159.30 = 45,000.20 : x
  2. Step 2: Convert to fraction form
    128,106.20/192,159.30 = 45,000.20/x
  3. Step 3: Cross multiply
    128,106.20x = 192,159.30 × 45,000.20
  4. Step 4: Simplify right side
    128,106.20x = 8,647,206,931.86
  5. Step 5: Solve for x
    x = 8,647,206,931.86/128,106.20
  6. Step 6: Final answer
    x = 67,500.30

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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.