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Finding the Fourth Proportional to 69,018.71, 95,243.36 and 38,391.66

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Solution

The fourth proportional to 69,018.71, 95,243.36 and 38,391.66 is: 52,979.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,018.71 : 95,243.36 = 38,391.66 : x
  2. Step 2: Convert to fraction form
    69,018.71/95,243.36 = 38,391.66/x
  3. Step 3: Cross multiply
    69,018.71x = 95,243.36 × 38,391.66
  4. Step 4: Simplify right side
    69,018.71x = 3,656,550,502.42
  5. Step 5: Solve for x
    x = 3,656,550,502.42/69,018.71
  6. Step 6: Final answer
    x = 52,979.12

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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.