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Finding the Fourth Proportional to 53,231.67, 79,864.79 and 45,393.21

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Solution

The fourth proportional to 53,231.67, 79,864.79 and 45,393.21 is: 68,104.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,231.67 : 79,864.79 = 45,393.21 : x
  2. Step 2: Convert to fraction form
    53,231.67/79,864.79 = 45,393.21/x
  3. Step 3: Cross multiply
    53,231.67x = 79,864.79 × 45,393.21
  4. Step 4: Simplify right side
    53,231.67x = 3,625,318,957.11
  5. Step 5: Solve for x
    x = 3,625,318,957.11/53,231.67
  6. Step 6: Final answer
    x = 68,104.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.