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Finding the Fourth Proportional to 201,991.80, 278,924.94 and 126,670.20

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Solution

The fourth proportional to 201,991.80, 278,924.94 and 126,670.20 is: 174,915.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,991.80 : 278,924.94 = 126,670.20 : x
  2. Step 2: Convert to fraction form
    201,991.80/278,924.94 = 126,670.20/x
  3. Step 3: Cross multiply
    201,991.80x = 278,924.94 × 126,670.20
  4. Step 4: Simplify right side
    201,991.80x = 35,331,477,934.79
  5. Step 5: Solve for x
    x = 35,331,477,934.79/201,991.80
  6. Step 6: Final answer
    x = 174,915.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.