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Finding the Fourth Proportional to 201,708.60, 302,781.60 and 126,913.20

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Solution

The fourth proportional to 201,708.60, 302,781.60 and 126,913.20 is: 190,507.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,708.60 : 302,781.60 = 126,913.20 : x
  2. Step 2: Convert to fraction form
    201,708.60/302,781.60 = 126,913.20/x
  3. Step 3: Cross multiply
    201,708.60x = 302,781.60 × 126,913.20
  4. Step 4: Simplify right side
    201,708.60x = 38,426,981,757.12
  5. Step 5: Solve for x
    x = 38,426,981,757.12/201,708.60
  6. Step 6: Final answer
    x = 190,507.40

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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.