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Finding the Fourth Proportional to 71,398.70, 107,098.05 and 68,118.20

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Solution

The fourth proportional to 71,398.70, 107,098.05 and 68,118.20 is: 102,177.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.70 : 107,098.05 = 68,118.20 : x
  2. Step 2: Convert to fraction form
    71,398.70/107,098.05 = 68,118.20/x
  3. Step 3: Cross multiply
    71,398.70x = 107,098.05 × 68,118.20
  4. Step 4: Simplify right side
    71,398.70x = 7,295,326,389.51
  5. Step 5: Solve for x
    x = 7,295,326,389.51/71,398.70
  6. Step 6: Final answer
    x = 102,177.30

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1.5x scale

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.