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Finding the Fourth Proportional to 290,803.92, 436,206.03 and 91,139.85

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Solution

The fourth proportional to 290,803.92, 436,206.03 and 91,139.85 is: 136,709.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,803.92 : 436,206.03 = 91,139.85 : x
  2. Step 2: Convert to fraction form
    290,803.92/436,206.03 = 91,139.85/x
  3. Step 3: Cross multiply
    290,803.92x = 436,206.03 × 91,139.85
  4. Step 4: Simplify right side
    290,803.92x = 39,755,751,687.60
  5. Step 5: Solve for x
    x = 39,755,751,687.60/290,803.92
  6. Step 6: Final answer
    x = 136,709.82

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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.