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Finding the Fourth Proportional to 290,772.87, 436,159.17 and 91,108.95

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Solution

The fourth proportional to 290,772.87, 436,159.17 and 91,108.95 is: 136,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,772.87 : 436,159.17 = 91,108.95 : x
  2. Step 2: Convert to fraction form
    290,772.87/436,159.17 = 91,108.95/x
  3. Step 3: Cross multiply
    290,772.87x = 436,159.17 × 91,108.95
  4. Step 4: Simplify right side
    290,772.87x = 39,738,004,011.57
  5. Step 5: Solve for x
    x = 39,738,004,011.57/290,772.87
  6. Step 6: Final answer
    x = 136,663.38

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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.