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Finding the Fourth Proportional to 259,768.71, 389,655.90 and 91,293.84

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Solution

The fourth proportional to 259,768.71, 389,655.90 and 91,293.84 is: 136,941.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,768.71 : 389,655.90 = 91,293.84 : x
  2. Step 2: Convert to fraction form
    259,768.71/389,655.90 = 91,293.84/x
  3. Step 3: Cross multiply
    259,768.71x = 389,655.90 × 91,293.84
  4. Step 4: Simplify right side
    259,768.71x = 35,573,183,389.66
  5. Step 5: Solve for x
    x = 35,573,183,389.66/259,768.71
  6. Step 6: Final answer
    x = 136,941.76

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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.