Home / 45,105.20-67,666.12-18,812.20

Finding the Fourth Proportional to 45,105.20, 67,666.12 and 18,812.20

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Solution

The fourth proportional to 45,105.20, 67,666.12 and 18,812.20 is: 28,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,105.20 : 67,666.12 = 18,812.20 : x
  2. Step 2: Convert to fraction form
    45,105.20/67,666.12 = 18,812.20/x
  3. Step 3: Cross multiply
    45,105.20x = 67,666.12 × 18,812.20
  4. Step 4: Simplify right side
    45,105.20x = 1,272,948,582.66
  5. Step 5: Solve for x
    x = 1,272,948,582.66/45,105.20
  6. Step 6: Final answer
    x = 28,221.77

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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.