Home / 90,001.40-135,002.10-82,419.80

Finding the Fourth Proportional to 90,001.40, 135,002.10 and 82,419.80

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Solution

The fourth proportional to 90,001.40, 135,002.10 and 82,419.80 is: 123,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,001.40 : 135,002.10 = 82,419.80 : x
  2. Step 2: Convert to fraction form
    90,001.40/135,002.10 = 82,419.80/x
  3. Step 3: Cross multiply
    90,001.40x = 135,002.10 × 82,419.80
  4. Step 4: Simplify right side
    90,001.40x = 11,126,846,081.58
  5. Step 5: Solve for x
    x = 11,126,846,081.58/90,001.40
  6. Step 6: Final answer
    x = 123,629.70

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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.