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Finding the Fourth Proportional to 203,395.20, 305,121.60 and 63,139.20

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Solution

The fourth proportional to 203,395.20, 305,121.60 and 63,139.20 is: 94,717.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,395.20 : 305,121.60 = 63,139.20 : x
  2. Step 2: Convert to fraction form
    203,395.20/305,121.60 = 63,139.20/x
  3. Step 3: Cross multiply
    203,395.20x = 305,121.60 × 63,139.20
  4. Step 4: Simplify right side
    203,395.20x = 19,265,133,726.72
  5. Step 5: Solve for x
    x = 19,265,133,726.72/203,395.20
  6. Step 6: Final answer
    x = 94,717.74

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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.