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Finding the Fourth Proportional to 201,940.04, 278,449.62 and 129,247.76

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Solution

The fourth proportional to 201,940.04, 278,449.62 and 129,247.76 is: 178,216.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,940.04 : 278,449.62 = 129,247.76 : x
  2. Step 2: Convert to fraction form
    201,940.04/278,449.62 = 129,247.76/x
  3. Step 3: Cross multiply
    201,940.04x = 278,449.62 × 129,247.76
  4. Step 4: Simplify right side
    201,940.04x = 35,988,989,657.85
  5. Step 5: Solve for x
    x = 35,988,989,657.85/201,940.04
  6. Step 6: Final answer
    x = 178,216.22

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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.