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Finding the Fourth Proportional to 71,521.43, 107,352.76 and 53,690.09

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Solution

The fourth proportional to 71,521.43, 107,352.76 and 53,690.09 is: 80,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,521.43 : 107,352.76 = 53,690.09 : x
  2. Step 2: Convert to fraction form
    71,521.43/107,352.76 = 53,690.09/x
  3. Step 3: Cross multiply
    71,521.43x = 107,352.76 × 53,690.09
  4. Step 4: Simplify right side
    71,521.43x = 5,763,778,675.16
  5. Step 5: Solve for x
    x = 5,763,778,675.16/71,521.43
  6. Step 6: Final answer
    x = 80,588.14

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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.