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Finding the Fourth Proportional to 235,919.50, 325,564.05 and 128,491.42

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Solution

The fourth proportional to 235,919.50, 325,564.05 and 128,491.42 is: 177,315.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,919.50 : 325,564.05 = 128,491.42 : x
  2. Step 2: Convert to fraction form
    235,919.50/325,564.05 = 128,491.42/x
  3. Step 3: Cross multiply
    235,919.50x = 325,564.05 × 128,491.42
  4. Step 4: Simplify right side
    235,919.50x = 41,832,187,085.45
  5. Step 5: Solve for x
    x = 41,832,187,085.45/235,919.50
  6. Step 6: Final answer
    x = 177,315.51

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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.