Home / 290,821.42-436,232.16-91,141.78

Finding the Fourth Proportional to 290,821.42, 436,232.16 and 91,141.78

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Solution

The fourth proportional to 290,821.42, 436,232.16 and 91,141.78 is: 136,712.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,821.42 : 436,232.16 = 91,141.78 : x
  2. Step 2: Convert to fraction form
    290,821.42/436,232.16 = 91,141.78/x
  3. Step 3: Cross multiply
    290,821.42x = 436,232.16 × 91,141.78
  4. Step 4: Simplify right side
    290,821.42x = 39,758,975,555.64
  5. Step 5: Solve for x
    x = 39,758,975,555.64/290,821.42
  6. Step 6: Final answer
    x = 136,712.68

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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.