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Finding the Fourth Proportional to 53,778.60, 80,648.70 and 18,719.40

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Solution

The fourth proportional to 53,778.60, 80,648.70 and 18,719.40 is: 28,072.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,778.60 : 80,648.70 = 18,719.40 : x
  2. Step 2: Convert to fraction form
    53,778.60/80,648.70 = 18,719.40/x
  3. Step 3: Cross multiply
    53,778.60x = 80,648.70 × 18,719.40
  4. Step 4: Simplify right side
    53,778.60x = 1,509,695,274.78
  5. Step 5: Solve for x
    x = 1,509,695,274.78/53,778.60
  6. Step 6: Final answer
    x = 28,072.42

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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.