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Finding the Fourth Proportional to 281,249.51, 421,918.08 and 91,665.89

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Solution

The fourth proportional to 281,249.51, 421,918.08 and 91,665.89 is: 137,513.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,249.51 : 421,918.08 = 91,665.89 : x
  2. Step 2: Convert to fraction form
    281,249.51/421,918.08 = 91,665.89/x
  3. Step 3: Cross multiply
    281,249.51x = 421,918.08 × 91,665.89
  4. Step 4: Simplify right side
    281,249.51x = 38,675,495,163.67
  5. Step 5: Solve for x
    x = 38,675,495,163.67/281,249.51
  6. Step 6: Final answer
    x = 137,513.11

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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.