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Finding the Fourth Proportional to 65,795.63, 90,715.68 and 54,909.44

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Solution

The fourth proportional to 65,795.63, 90,715.68 and 54,909.44 is: 75,706.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,795.63 : 90,715.68 = 54,909.44 : x
  2. Step 2: Convert to fraction form
    65,795.63/90,715.68 = 54,909.44/x
  3. Step 3: Cross multiply
    65,795.63x = 90,715.68 × 54,909.44
  4. Step 4: Simplify right side
    65,795.63x = 4,981,147,188.02
  5. Step 5: Solve for x
    x = 4,981,147,188.02/65,795.63
  6. Step 6: Final answer
    x = 75,706.35

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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.