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Finding the Fourth Proportional to 217,707.17, 326,685.11 and 84,570.09

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Solution

The fourth proportional to 217,707.17, 326,685.11 and 84,570.09 is: 126,903.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,707.17 : 326,685.11 = 84,570.09 : x
  2. Step 2: Convert to fraction form
    217,707.17/326,685.11 = 84,570.09/x
  3. Step 3: Cross multiply
    217,707.17x = 326,685.11 × 84,570.09
  4. Step 4: Simplify right side
    217,707.17x = 27,627,788,731.51
  5. Step 5: Solve for x
    x = 27,627,788,731.51/217,707.17
  6. Step 6: Final answer
    x = 126,903.44

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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.