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Finding the Fourth Proportional to 235,920, 325,564.74 and 128,491.92

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Solution

The fourth proportional to 235,920, 325,564.74 and 128,491.92 is: 177,316.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,920 : 325,564.74 = 128,491.92 : x
  2. Step 2: Convert to fraction form
    235,920/325,564.74 = 128,491.92/x
  3. Step 3: Cross multiply
    235,920x = 325,564.74 × 128,491.92
  4. Step 4: Simplify right side
    235,920x = 41,832,438,526.90
  5. Step 5: Solve for x
    x = 41,832,438,526.90/235,920
  6. Step 6: Final answer
    x = 177,316.20

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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.