Home / 90,398.20-135,629.82-31,239.84

Finding the Fourth Proportional to 90,398.20, 135,629.82 and 31,239.84

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Solution

The fourth proportional to 90,398.20, 135,629.82 and 31,239.84 is: 46,871.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,398.20 : 135,629.82 = 31,239.84 : x
  2. Step 2: Convert to fraction form
    90,398.20/135,629.82 = 31,239.84/x
  3. Step 3: Cross multiply
    90,398.20x = 135,629.82 × 31,239.84
  4. Step 4: Simplify right side
    90,398.20x = 4,237,053,876.03
  5. Step 5: Solve for x
    x = 4,237,053,876.03/90,398.20
  6. Step 6: Final answer
    x = 46,871.00

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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.