Home / 45,309.90-67,909.32-20,343.54

Finding the Fourth Proportional to 45,309.90, 67,909.32 and 20,343.54

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Solution

The fourth proportional to 45,309.90, 67,909.32 and 20,343.54 is: 30,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,309.90 : 67,909.32 = 20,343.54 : x
  2. Step 2: Convert to fraction form
    45,309.90/67,909.32 = 20,343.54/x
  3. Step 3: Cross multiply
    45,309.90x = 67,909.32 × 20,343.54
  4. Step 4: Simplify right side
    45,309.90x = 1,381,515,967.79
  5. Step 5: Solve for x
    x = 1,381,515,967.79/45,309.90
  6. Step 6: Final answer
    x = 30,490.38

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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.