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Finding the Fourth Proportional to 217,754.43, 326,758.13 and 84,726.51

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Solution

The fourth proportional to 217,754.43, 326,758.13 and 84,726.51 is: 127,138.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,754.43 : 326,758.13 = 84,726.51 : x
  2. Step 2: Convert to fraction form
    217,754.43/326,758.13 = 84,726.51/x
  3. Step 3: Cross multiply
    217,754.43x = 326,758.13 × 84,726.51
  4. Step 4: Simplify right side
    217,754.43x = 27,685,075,545.39
  5. Step 5: Solve for x
    x = 27,685,075,545.39/217,754.43
  6. Step 6: Final answer
    x = 127,138.98

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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.