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Finding the Fourth Proportional to 203,105.04, 304,719.84 and 90,879.72

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Solution

The fourth proportional to 203,105.04, 304,719.84 and 90,879.72 is: 136,347.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,105.04 : 304,719.84 = 90,879.72 : x
  2. Step 2: Convert to fraction form
    203,105.04/304,719.84 = 90,879.72/x
  3. Step 3: Cross multiply
    203,105.04x = 304,719.84 × 90,879.72
  4. Step 4: Simplify right side
    203,105.04x = 27,692,853,737.64
  5. Step 5: Solve for x
    x = 27,692,853,737.64/203,105.04
  6. Step 6: Final answer
    x = 136,347.45

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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.