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Finding the Fourth Proportional to 217,969.70, 326,711.55 and 84,805.70

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Solution

The fourth proportional to 217,969.70, 326,711.55 and 84,805.70 is: 127,114.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,969.70 : 326,711.55 = 84,805.70 : x
  2. Step 2: Convert to fraction form
    217,969.70/326,711.55 = 84,805.70/x
  3. Step 3: Cross multiply
    217,969.70x = 326,711.55 × 84,805.70
  4. Step 4: Simplify right side
    217,969.70x = 27,707,001,695.84
  5. Step 5: Solve for x
    x = 27,707,001,695.84/217,969.70
  6. Step 6: Final answer
    x = 127,114.01

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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.