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Finding the Fourth Proportional to 138,426.80, 207,202.80 and 108,683.60

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Solution

The fourth proportional to 138,426.80, 207,202.80 and 108,683.60 is: 162,681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,426.80 : 207,202.80 = 108,683.60 : x
  2. Step 2: Convert to fraction form
    138,426.80/207,202.80 = 108,683.60/x
  3. Step 3: Cross multiply
    138,426.80x = 207,202.80 × 108,683.60
  4. Step 4: Simplify right side
    138,426.80x = 22,519,546,234.08
  5. Step 5: Solve for x
    x = 22,519,546,234.08/138,426.80
  6. Step 6: Final answer
    x = 162,681.98

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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.