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Finding the Fourth Proportional to 290,773.63, 436,160.30 and 91,109.71

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Solution

The fourth proportional to 290,773.63, 436,160.30 and 91,109.71 is: 136,664.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,773.63 : 436,160.30 = 91,109.71 : x
  2. Step 2: Convert to fraction form
    290,773.63/436,160.30 = 91,109.71/x
  3. Step 3: Cross multiply
    290,773.63x = 436,160.30 × 91,109.71
  4. Step 4: Simplify right side
    290,773.63x = 39,738,437,990.96
  5. Step 5: Solve for x
    x = 39,738,437,990.96/290,773.63
  6. Step 6: Final answer
    x = 136,664.52

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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.