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Finding the Fourth Proportional to 363,660.60, 545,231.70 and 138,934.20

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Solution

The fourth proportional to 363,660.60, 545,231.70 and 138,934.20 is: 208,302.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,660.60 : 545,231.70 = 138,934.20 : x
  2. Step 2: Convert to fraction form
    363,660.60/545,231.70 = 138,934.20/x
  3. Step 3: Cross multiply
    363,660.60x = 545,231.70 × 138,934.20
  4. Step 4: Simplify right side
    363,660.60x = 75,751,330,054.14
  5. Step 5: Solve for x
    x = 75,751,330,054.14/363,660.60
  6. Step 6: Final answer
    x = 208,302.27

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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.