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Finding the Fourth Proportional to 259,308, 389,027.64 and 72,319.50

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Solution

The fourth proportional to 259,308, 389,027.64 and 72,319.50 is: 108,497.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,308 : 389,027.64 = 72,319.50 : x
  2. Step 2: Convert to fraction form
    259,308/389,027.64 = 72,319.50/x
  3. Step 3: Cross multiply
    259,308x = 389,027.64 × 72,319.50
  4. Step 4: Simplify right side
    259,308x = 28,134,284,410.98
  5. Step 5: Solve for x
    x = 28,134,284,410.98/259,308
  6. Step 6: Final answer
    x = 108,497.56

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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.