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Finding the Fourth Proportional to 520,352.30, 780,468.83 and 136,138.25

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Solution

The fourth proportional to 520,352.30, 780,468.83 and 136,138.25 is: 204,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,352.30 : 780,468.83 = 136,138.25 : x
  2. Step 2: Convert to fraction form
    520,352.30/780,468.83 = 136,138.25/x
  3. Step 3: Cross multiply
    520,352.30x = 780,468.83 × 136,138.25
  4. Step 4: Simplify right side
    520,352.30x = 106,251,660,695.75
  5. Step 5: Solve for x
    x = 106,251,660,695.75/520,352.30
  6. Step 6: Final answer
    x = 204,191.78

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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.