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Finding the Fourth Proportional to 140,959.64, 211,619.87 and 121,096.21

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Solution

The fourth proportional to 140,959.64, 211,619.87 and 121,096.21 is: 181,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,959.64 : 211,619.87 = 121,096.21 : x
  2. Step 2: Convert to fraction form
    140,959.64/211,619.87 = 121,096.21/x
  3. Step 3: Cross multiply
    140,959.64x = 211,619.87 × 121,096.21
  4. Step 4: Simplify right side
    140,959.64x = 25,626,364,841.72
  5. Step 5: Solve for x
    x = 25,626,364,841.72/140,959.64
  6. Step 6: Final answer
    x = 181,799.31

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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.