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Finding the Fourth Proportional to 144,739.20, 217,303.20 and 92,380.80

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Solution

The fourth proportional to 144,739.20, 217,303.20 and 92,380.80 is: 138,695.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,739.20 : 217,303.20 = 92,380.80 : x
  2. Step 2: Convert to fraction form
    144,739.20/217,303.20 = 92,380.80/x
  3. Step 3: Cross multiply
    144,739.20x = 217,303.20 × 92,380.80
  4. Step 4: Simplify right side
    144,739.20x = 20,074,643,458.56
  5. Step 5: Solve for x
    x = 20,074,643,458.56/144,739.20
  6. Step 6: Final answer
    x = 138,695.28

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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.