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Finding the Fourth Proportional to 65,891.86, 90,943.68 and 51,523.30

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Solution

The fourth proportional to 65,891.86, 90,943.68 and 51,523.30 is: 71,112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.86 : 90,943.68 = 51,523.30 : x
  2. Step 2: Convert to fraction form
    65,891.86/90,943.68 = 51,523.30/x
  3. Step 3: Cross multiply
    65,891.86x = 90,943.68 × 51,523.30
  4. Step 4: Simplify right side
    65,891.86x = 4,685,718,507.74
  5. Step 5: Solve for x
    x = 4,685,718,507.74/65,891.86
  6. Step 6: Final answer
    x = 71,112.25

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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.