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Finding the Fourth Proportional to 65,249.70, 90,040.28 and 38,387.00

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Solution

The fourth proportional to 65,249.70, 90,040.28 and 38,387.00 is: 52,971.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,249.70 : 90,040.28 = 38,387.00 : x
  2. Step 2: Convert to fraction form
    65,249.70/90,040.28 = 38,387.00/x
  3. Step 3: Cross multiply
    65,249.70x = 90,040.28 × 38,387.00
  4. Step 4: Simplify right side
    65,249.70x = 3,456,375,586.22
  5. Step 5: Solve for x
    x = 3,456,375,586.22/65,249.70
  6. Step 6: Final answer
    x = 52,971.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.