Home / 65,705.10-90,680.16-40,228.62

Finding the Fourth Proportional to 65,705.10, 90,680.16 and 40,228.62

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Solution

The fourth proportional to 65,705.10, 90,680.16 and 40,228.62 is: 55,519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,705.10 : 90,680.16 = 40,228.62 : x
  2. Step 2: Convert to fraction form
    65,705.10/90,680.16 = 40,228.62/x
  3. Step 3: Cross multiply
    65,705.10x = 90,680.16 × 40,228.62
  4. Step 4: Simplify right side
    65,705.10x = 3,647,937,698.18
  5. Step 5: Solve for x
    x = 3,647,937,698.18/65,705.10
  6. Step 6: Final answer
    x = 55,519.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.