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Finding the Fourth Proportional to 65,745.81, 90,744.32 and 40,266.22

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Solution

The fourth proportional to 65,745.81, 90,744.32 and 40,266.22 is: 55,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,745.81 : 90,744.32 = 40,266.22 : x
  2. Step 2: Convert to fraction form
    65,745.81/90,744.32 = 40,266.22/x
  3. Step 3: Cross multiply
    65,745.81x = 90,744.32 × 40,266.22
  4. Step 4: Simplify right side
    65,745.81x = 3,653,930,591.66
  5. Step 5: Solve for x
    x = 3,653,930,591.66/65,745.81
  6. Step 6: Final answer
    x = 55,576.63

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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.