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Finding the Fourth Proportional to 53,940.80, 80,930.40 and 52,020.80

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Solution

The fourth proportional to 53,940.80, 80,930.40 and 52,020.80 is: 78,049.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,940.80 : 80,930.40 = 52,020.80 : x
  2. Step 2: Convert to fraction form
    53,940.80/80,930.40 = 52,020.80/x
  3. Step 3: Cross multiply
    53,940.80x = 80,930.40 × 52,020.80
  4. Step 4: Simplify right side
    53,940.80x = 4,210,064,152.32
  5. Step 5: Solve for x
    x = 4,210,064,152.32/53,940.80
  6. Step 6: Final answer
    x = 78,049.72

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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.