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Finding the Fourth Proportional to 201,656.79, 278,171.06 and 126,074.07

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Solution

The fourth proportional to 201,656.79, 278,171.06 and 126,074.07 is: 173,910.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,656.79 : 278,171.06 = 126,074.07 : x
  2. Step 2: Convert to fraction form
    201,656.79/278,171.06 = 126,074.07/x
  3. Step 3: Cross multiply
    201,656.79x = 278,171.06 × 126,074.07
  4. Step 4: Simplify right side
    201,656.79x = 35,070,157,769.21
  5. Step 5: Solve for x
    x = 35,070,157,769.21/201,656.79
  6. Step 6: Final answer
    x = 173,910.13

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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.