Home / 70,418.20-105,632.82-20,499.04

Finding the Fourth Proportional to 70,418.20, 105,632.82 and 20,499.04

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Solution

The fourth proportional to 70,418.20, 105,632.82 and 20,499.04 is: 30,750.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,418.20 : 105,632.82 = 20,499.04 : x
  2. Step 2: Convert to fraction form
    70,418.20/105,632.82 = 20,499.04/x
  3. Step 3: Cross multiply
    70,418.20x = 105,632.82 × 20,499.04
  4. Step 4: Simplify right side
    70,418.20x = 2,165,371,402.49
  5. Step 5: Solve for x
    x = 2,165,371,402.49/70,418.20
  6. Step 6: Final answer
    x = 30,750.17

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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.