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Finding the Fourth Proportional to 259,653.70, 389,442.15 and 72,684.10

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Solution

The fourth proportional to 259,653.70, 389,442.15 and 72,684.10 is: 109,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,653.70 : 389,442.15 = 72,684.10 : x
  2. Step 2: Convert to fraction form
    259,653.70/389,442.15 = 72,684.10/x
  3. Step 3: Cross multiply
    259,653.70x = 389,442.15 × 72,684.10
  4. Step 4: Simplify right side
    259,653.70x = 28,306,252,174.82
  5. Step 5: Solve for x
    x = 28,306,252,174.82/259,653.70
  6. Step 6: Final answer
    x = 109,015.40

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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.