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Finding the Fourth Proportional to 65,018.68, 89,719.26 and 36,718.96

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Solution

The fourth proportional to 65,018.68, 89,719.26 and 36,718.96 is: 50,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,018.68 : 89,719.26 = 36,718.96 : x
  2. Step 2: Convert to fraction form
    65,018.68/89,719.26 = 36,718.96/x
  3. Step 3: Cross multiply
    65,018.68x = 89,719.26 × 36,718.96
  4. Step 4: Simplify right side
    65,018.68x = 3,294,397,919.17
  5. Step 5: Solve for x
    x = 3,294,397,919.17/65,018.68
  6. Step 6: Final answer
    x = 50,668.48

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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.