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Finding the Fourth Proportional to 91,265.84, 136,911.94 and 28,091.38

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Solution

The fourth proportional to 91,265.84, 136,911.94 and 28,091.38 is: 42,141.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,265.84 : 136,911.94 = 28,091.38 : x
  2. Step 2: Convert to fraction form
    91,265.84/136,911.94 = 28,091.38/x
  3. Step 3: Cross multiply
    91,265.84x = 136,911.94 × 28,091.38
  4. Step 4: Simplify right side
    91,265.84x = 3,846,045,333.08
  5. Step 5: Solve for x
    x = 3,846,045,333.08/91,265.84
  6. Step 6: Final answer
    x = 42,141.13

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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.