Home / 120,739.20-181,303.20-81,470.40

Finding the Fourth Proportional to 120,739.20, 181,303.20 and 81,470.40

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Solution

The fourth proportional to 120,739.20, 181,303.20 and 81,470.40 is: 122,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,739.20 : 181,303.20 = 81,470.40 : x
  2. Step 2: Convert to fraction form
    120,739.20/181,303.20 = 81,470.40/x
  3. Step 3: Cross multiply
    120,739.20x = 181,303.20 × 81,470.40
  4. Step 4: Simplify right side
    120,739.20x = 14,770,844,225.28
  5. Step 5: Solve for x
    x = 14,770,844,225.28/120,739.20
  6. Step 6: Final answer
    x = 122,336.77

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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.