Home / 90,181.20-135,304.62-42,810.78

Finding the Fourth Proportional to 90,181.20, 135,304.62 and 42,810.78

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Solution

The fourth proportional to 90,181.20, 135,304.62 and 42,810.78 is: 64,231.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,181.20 : 135,304.62 = 42,810.78 : x
  2. Step 2: Convert to fraction form
    90,181.20/135,304.62 = 42,810.78/x
  3. Step 3: Cross multiply
    90,181.20x = 135,304.62 × 42,810.78
  4. Step 4: Simplify right side
    90,181.20x = 5,792,496,319.80
  5. Step 5: Solve for x
    x = 5,792,496,319.80/90,181.20
  6. Step 6: Final answer
    x = 64,231.75

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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.