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Finding the Fourth Proportional to 218,856.81, 328,057.59 and 92,391.51

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Solution

The fourth proportional to 218,856.81, 328,057.59 and 92,391.51 is: 138,491.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,856.81 : 328,057.59 = 92,391.51 : x
  2. Step 2: Convert to fraction form
    218,856.81/328,057.59 = 92,391.51/x
  3. Step 3: Cross multiply
    218,856.81x = 328,057.59 × 92,391.51
  4. Step 4: Simplify right side
    218,856.81x = 30,309,736,107.06
  5. Step 5: Solve for x
    x = 30,309,736,107.06/218,856.81
  6. Step 6: Final answer
    x = 138,491.17

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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.