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Finding the Fourth Proportional to 65,912, 90,958.88 and 36,104

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Solution

The fourth proportional to 65,912, 90,958.88 and 36,104 is: 49,823.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,912 : 90,958.88 = 36,104 : x
  2. Step 2: Convert to fraction form
    65,912/90,958.88 = 36,104/x
  3. Step 3: Cross multiply
    65,912x = 90,958.88 × 36,104
  4. Step 4: Simplify right side
    65,912x = 3,283,979,403.52
  5. Step 5: Solve for x
    x = 3,283,979,403.52/65,912
  6. Step 6: Final answer
    x = 49,823.70

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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.