Home / 90,744.20-136,083.90-31,581.80

Finding the Fourth Proportional to 90,744.20, 136,083.90 and 31,581.80

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Solution

The fourth proportional to 90,744.20, 136,083.90 and 31,581.80 is: 47,361.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,744.20 : 136,083.90 = 31,581.80 : x
  2. Step 2: Convert to fraction form
    90,744.20/136,083.90 = 31,581.80/x
  3. Step 3: Cross multiply
    90,744.20x = 136,083.90 × 31,581.80
  4. Step 4: Simplify right side
    90,744.20x = 4,297,774,513.02
  5. Step 5: Solve for x
    x = 4,297,774,513.02/90,744.20
  6. Step 6: Final answer
    x = 47,361.42

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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.