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Finding the Fourth Proportional to 65,265.72, 90,081.18 and 36,987

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Solution

The fourth proportional to 65,265.72, 90,081.18 and 36,987 is: 51,050.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,265.72 : 90,081.18 = 36,987 : x
  2. Step 2: Convert to fraction form
    65,265.72/90,081.18 = 36,987/x
  3. Step 3: Cross multiply
    65,265.72x = 90,081.18 × 36,987
  4. Step 4: Simplify right side
    65,265.72x = 3,331,832,604.66
  5. Step 5: Solve for x
    x = 3,331,832,604.66/65,265.72
  6. Step 6: Final answer
    x = 51,050.27

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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.