Home / 260,161.32-390,309.15-80,242.71

Finding the Fourth Proportional to 260,161.32, 390,309.15 and 80,242.71

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Solution

The fourth proportional to 260,161.32, 390,309.15 and 80,242.71 is: 120,384.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,161.32 : 390,309.15 = 80,242.71 : x
  2. Step 2: Convert to fraction form
    260,161.32/390,309.15 = 80,242.71/x
  3. Step 3: Cross multiply
    260,161.32x = 390,309.15 × 80,242.71
  4. Step 4: Simplify right side
    260,161.32x = 31,319,462,470.14
  5. Step 5: Solve for x
    x = 31,319,462,470.14/260,161.32
  6. Step 6: Final answer
    x = 120,384.78

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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.