Home / 318,864.20-478,363.76-105,620.03

Finding the Fourth Proportional to 318,864.20, 478,363.76 and 105,620.03

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Solution

The fourth proportional to 318,864.20, 478,363.76 and 105,620.03 is: 158,452.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,864.20 : 478,363.76 = 105,620.03 : x
  2. Step 2: Convert to fraction form
    318,864.20/478,363.76 = 105,620.03/x
  3. Step 3: Cross multiply
    318,864.20x = 478,363.76 × 105,620.03
  4. Step 4: Simplify right side
    318,864.20x = 50,524,793,952.13
  5. Step 5: Solve for x
    x = 50,524,793,952.13/318,864.20
  6. Step 6: Final answer
    x = 158,452.39

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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.