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Finding the Fourth Proportional to 65,911.72, 90,963.78 and 37,236.65

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Solution

The fourth proportional to 65,911.72, 90,963.78 and 37,236.65 is: 51,389.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,911.72 : 90,963.78 = 37,236.65 : x
  2. Step 2: Convert to fraction form
    65,911.72/90,963.78 = 37,236.65/x
  3. Step 3: Cross multiply
    65,911.72x = 90,963.78 × 37,236.65
  4. Step 4: Simplify right side
    65,911.72x = 3,387,185,989.11
  5. Step 5: Solve for x
    x = 3,387,185,989.11/65,911.72
  6. Step 6: Final answer
    x = 51,389.73

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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.