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Finding the Fourth Proportional to 71,661.90, 107,345.03 and 41,989.80

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Solution

The fourth proportional to 71,661.90, 107,345.03 and 41,989.80 is: 62,898.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,661.90 : 107,345.03 = 41,989.80 : x
  2. Step 2: Convert to fraction form
    71,661.90/107,345.03 = 41,989.80/x
  3. Step 3: Cross multiply
    71,661.90x = 107,345.03 × 41,989.80
  4. Step 4: Simplify right side
    71,661.90x = 4,507,396,130.75
  5. Step 5: Solve for x
    x = 4,507,396,130.75/71,661.90
  6. Step 6: Final answer
    x = 62,898.08

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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.