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Finding the Fourth Proportional to 71,808.39, 107,662.62 and 31,805.66

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Solution

The fourth proportional to 71,808.39, 107,662.62 and 31,805.66 is: 47,686.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.39 : 107,662.62 = 31,805.66 : x
  2. Step 2: Convert to fraction form
    71,808.39/107,662.62 = 31,805.66/x
  3. Step 3: Cross multiply
    71,808.39x = 107,662.62 × 31,805.66
  4. Step 4: Simplify right side
    71,808.39x = 3,424,280,148.12
  5. Step 5: Solve for x
    x = 3,424,280,148.12/71,808.39
  6. Step 6: Final answer
    x = 47,686.35

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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.