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Finding the Fourth Proportional to 53,290.60, 79,921.32 and 20,008.11

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Solution

The fourth proportional to 53,290.60, 79,921.32 and 20,008.11 is: 30,006.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,290.60 : 79,921.32 = 20,008.11 : x
  2. Step 2: Convert to fraction form
    53,290.60/79,921.32 = 20,008.11/x
  3. Step 3: Cross multiply
    53,290.60x = 79,921.32 × 20,008.11
  4. Step 4: Simplify right side
    53,290.60x = 1,599,074,162.30
  5. Step 5: Solve for x
    x = 1,599,074,162.30/53,290.60
  6. Step 6: Final answer
    x = 30,006.68

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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.