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Finding the Fourth Proportional to 270,682.62, 406,079.95 and 81,135.33

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Solution

The fourth proportional to 270,682.62, 406,079.95 and 81,135.33 is: 121,719.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,682.62 : 406,079.95 = 81,135.33 : x
  2. Step 2: Convert to fraction form
    270,682.62/406,079.95 = 81,135.33/x
  3. Step 3: Cross multiply
    270,682.62x = 406,079.95 × 81,135.33
  4. Step 4: Simplify right side
    270,682.62x = 32,947,430,749.63
  5. Step 5: Solve for x
    x = 32,947,430,749.63/270,682.62
  6. Step 6: Final answer
    x = 121,719.79

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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.