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Finding the Fourth Proportional to 53,929.80, 80,873.10 and 18,851.40

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Solution

The fourth proportional to 53,929.80, 80,873.10 and 18,851.40 is: 28,269.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,929.80 : 80,873.10 = 18,851.40 : x
  2. Step 2: Convert to fraction form
    53,929.80/80,873.10 = 18,851.40/x
  3. Step 3: Cross multiply
    53,929.80x = 80,873.10 × 18,851.40
  4. Step 4: Simplify right side
    53,929.80x = 1,524,571,157.34
  5. Step 5: Solve for x
    x = 1,524,571,157.34/53,929.80
  6. Step 6: Final answer
    x = 28,269.55

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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.