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Finding the Fourth Proportional to 138,666.60, 207,999.23 and 54,367.20

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Solution

The fourth proportional to 138,666.60, 207,999.23 and 54,367.20 is: 81,550.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.60 : 207,999.23 = 54,367.20 : x
  2. Step 2: Convert to fraction form
    138,666.60/207,999.23 = 54,367.20/x
  3. Step 3: Cross multiply
    138,666.60x = 207,999.23 × 54,367.20
  4. Step 4: Simplify right side
    138,666.60x = 11,308,335,465.42
  5. Step 5: Solve for x
    x = 11,308,335,465.42/138,666.60
  6. Step 6: Final answer
    x = 81,550.54

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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.