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Finding the Fourth Proportional to 259,881.21, 389,854.62 and 91,361.93

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Solution

The fourth proportional to 259,881.21, 389,854.62 and 91,361.93 is: 137,054.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,881.21 : 389,854.62 = 91,361.93 : x
  2. Step 2: Convert to fraction form
    259,881.21/389,854.62 = 91,361.93/x
  3. Step 3: Cross multiply
    259,881.21x = 389,854.62 × 91,361.93
  4. Step 4: Simplify right side
    259,881.21x = 35,617,868,553.34
  5. Step 5: Solve for x
    x = 35,617,868,553.34/259,881.21
  6. Step 6: Final answer
    x = 137,054.42

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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.