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Finding the Fourth Proportional to 65,324.34, 90,163.90 and 40,159.26

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Solution

The fourth proportional to 65,324.34, 90,163.90 and 40,159.26 is: 55,429.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,324.34 : 90,163.90 = 40,159.26 : x
  2. Step 2: Convert to fraction form
    65,324.34/90,163.90 = 40,159.26/x
  3. Step 3: Cross multiply
    65,324.34x = 90,163.90 × 40,159.26
  4. Step 4: Simplify right side
    65,324.34x = 3,620,915,502.71
  5. Step 5: Solve for x
    x = 3,620,915,502.71/65,324.34
  6. Step 6: Final answer
    x = 55,429.81

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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.