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Finding the Fourth Proportional to 65,690.74, 90,660.45 and 37,391.86

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Solution

The fourth proportional to 65,690.74, 90,660.45 and 37,391.86 is: 51,604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,690.74 : 90,660.45 = 37,391.86 : x
  2. Step 2: Convert to fraction form
    65,690.74/90,660.45 = 37,391.86/x
  3. Step 3: Cross multiply
    65,690.74x = 90,660.45 × 37,391.86
  4. Step 4: Simplify right side
    65,690.74x = 3,389,962,853.94
  5. Step 5: Solve for x
    x = 3,389,962,853.94/65,690.74
  6. Step 6: Final answer
    x = 51,604.88

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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.