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Finding the Fourth Proportional to 203,719.12, 305,404.93 and 77,288.65

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Solution

The fourth proportional to 203,719.12, 305,404.93 and 77,288.65 is: 115,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,719.12 : 305,404.93 = 77,288.65 : x
  2. Step 2: Convert to fraction form
    203,719.12/305,404.93 = 77,288.65/x
  3. Step 3: Cross multiply
    203,719.12x = 305,404.93 × 77,288.65
  4. Step 4: Simplify right side
    203,719.12x = 23,604,334,743.04
  5. Step 5: Solve for x
    x = 23,604,334,743.04/203,719.12
  6. Step 6: Final answer
    x = 115,867.06

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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.