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Finding the Fourth Proportional to 290,771.37, 436,156.92 and 91,107.45

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Solution

The fourth proportional to 290,771.37, 436,156.92 and 91,107.45 is: 136,661.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,771.37 : 436,156.92 = 91,107.45 : x
  2. Step 2: Convert to fraction form
    290,771.37/436,156.92 = 91,107.45/x
  3. Step 3: Cross multiply
    290,771.37x = 436,156.92 × 91,107.45
  4. Step 4: Simplify right side
    290,771.37x = 39,737,144,781.05
  5. Step 5: Solve for x
    x = 39,737,144,781.05/290,771.37
  6. Step 6: Final answer
    x = 136,661.13

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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.