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Finding the Fourth Proportional to 53,879.60, 80,819.40 and 14,442.80

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Solution

The fourth proportional to 53,879.60, 80,819.40 and 14,442.80 is: 21,664.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,879.60 : 80,819.40 = 14,442.80 : x
  2. Step 2: Convert to fraction form
    53,879.60/80,819.40 = 14,442.80/x
  3. Step 3: Cross multiply
    53,879.60x = 80,819.40 × 14,442.80
  4. Step 4: Simplify right side
    53,879.60x = 1,167,258,430.32
  5. Step 5: Solve for x
    x = 1,167,258,430.32/53,879.60
  6. Step 6: Final answer
    x = 21,664.20

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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.