Home / 90,602.20-135,903.30-82,145.80

Finding the Fourth Proportional to 90,602.20, 135,903.30 and 82,145.80

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Solution

The fourth proportional to 90,602.20, 135,903.30 and 82,145.80 is: 123,218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,602.20 : 135,903.30 = 82,145.80 : x
  2. Step 2: Convert to fraction form
    90,602.20/135,903.30 = 82,145.80/x
  3. Step 3: Cross multiply
    90,602.20x = 135,903.30 × 82,145.80
  4. Step 4: Simplify right side
    90,602.20x = 11,163,885,301.14
  5. Step 5: Solve for x
    x = 11,163,885,301.14/90,602.20
  6. Step 6: Final answer
    x = 123,218.70

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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.