Home / 90,642.20-135,963.30-57,181.10

Finding the Fourth Proportional to 90,642.20, 135,963.30 and 57,181.10

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Solution

The fourth proportional to 90,642.20, 135,963.30 and 57,181.10 is: 85,771.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,642.20 : 135,963.30 = 57,181.10 : x
  2. Step 2: Convert to fraction form
    90,642.20/135,963.30 = 57,181.10/x
  3. Step 3: Cross multiply
    90,642.20x = 135,963.30 × 57,181.10
  4. Step 4: Simplify right side
    90,642.20x = 7,774,531,053.63
  5. Step 5: Solve for x
    x = 7,774,531,053.63/90,642.20
  6. Step 6: Final answer
    x = 85,771.65

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1.5x scale

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.