Home / 290,823.72-436,223.22-91,139.70

Finding the Fourth Proportional to 290,823.72, 436,223.22 and 91,139.70

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Solution

The fourth proportional to 290,823.72, 436,223.22 and 91,139.70 is: 136,705.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,823.72 : 436,223.22 = 91,139.70 : x
  2. Step 2: Convert to fraction form
    290,823.72/436,223.22 = 91,139.70/x
  3. Step 3: Cross multiply
    290,823.72x = 436,223.22 × 91,139.70
  4. Step 4: Simplify right side
    290,823.72x = 39,757,253,403.83
  5. Step 5: Solve for x
    x = 39,757,253,403.83/290,823.72
  6. Step 6: Final answer
    x = 136,705.68

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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.