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Finding the Fourth Proportional to 65,747.91, 90,710.75 and 40,227.67

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Solution

The fourth proportional to 65,747.91, 90,710.75 and 40,227.67 is: 55,501.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,747.91 : 90,710.75 = 40,227.67 : x
  2. Step 2: Convert to fraction form
    65,747.91/90,710.75 = 40,227.67/x
  3. Step 3: Cross multiply
    65,747.91x = 90,710.75 × 40,227.67
  4. Step 4: Simplify right side
    65,747.91x = 3,649,081,915.31
  5. Step 5: Solve for x
    x = 3,649,081,915.31/65,747.91
  6. Step 6: Final answer
    x = 55,501.11

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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.