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Finding the Fourth Proportional to 71,393.70, 107,090.55 and 68,113.20

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Solution

The fourth proportional to 71,393.70, 107,090.55 and 68,113.20 is: 102,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,393.70 : 107,090.55 = 68,113.20 : x
  2. Step 2: Convert to fraction form
    71,393.70/107,090.55 = 68,113.20/x
  3. Step 3: Cross multiply
    71,393.70x = 107,090.55 × 68,113.20
  4. Step 4: Simplify right side
    71,393.70x = 7,294,280,050.26
  5. Step 5: Solve for x
    x = 7,294,280,050.26/71,393.70
  6. Step 6: Final answer
    x = 102,169.80

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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.