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Finding the Fourth Proportional to 53,913.60, 80,819.20 and 42,060.80

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Solution

The fourth proportional to 53,913.60, 80,819.20 and 42,060.80 is: 63,051.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,913.60 : 80,819.20 = 42,060.80 : x
  2. Step 2: Convert to fraction form
    53,913.60/80,819.20 = 42,060.80/x
  3. Step 3: Cross multiply
    53,913.60x = 80,819.20 × 42,060.80
  4. Step 4: Simplify right side
    53,913.60x = 3,399,320,207.36
  5. Step 5: Solve for x
    x = 3,399,320,207.36/53,913.60
  6. Step 6: Final answer
    x = 63,051.26

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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.