Home / 80,402.41-120,612.93-30,519.78

Finding the Fourth Proportional to 80,402.41, 120,612.93 and 30,519.78

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Solution

The fourth proportional to 80,402.41, 120,612.93 and 30,519.78 is: 45,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,402.41 : 120,612.93 = 30,519.78 : x
  2. Step 2: Convert to fraction form
    80,402.41/120,612.93 = 30,519.78/x
  3. Step 3: Cross multiply
    80,402.41x = 120,612.93 × 30,519.78
  4. Step 4: Simplify right side
    80,402.41x = 3,681,080,088.76
  5. Step 5: Solve for x
    x = 3,681,080,088.76/80,402.41
  6. Step 6: Final answer
    x = 45,783.21

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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.