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Finding the Fourth Proportional to 235,972.85, 325,642 and 128,542.62

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Solution

The fourth proportional to 235,972.85, 325,642 and 128,542.62 is: 177,388.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,972.85 : 325,642 = 128,542.62 : x
  2. Step 2: Convert to fraction form
    235,972.85/325,642 = 128,542.62/x
  3. Step 3: Cross multiply
    235,972.85x = 325,642 × 128,542.62
  4. Step 4: Simplify right side
    235,972.85x = 41,858,875,862.04
  5. Step 5: Solve for x
    x = 41,858,875,862.04/235,972.85
  6. Step 6: Final answer
    x = 177,388.53

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1.5x scale

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.