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Finding the Fourth Proportional to 53,968.80, 80,893.80 and 18,890.40

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Solution

The fourth proportional to 53,968.80, 80,893.80 and 18,890.40 is: 28,314.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,968.80 : 80,893.80 = 18,890.40 : x
  2. Step 2: Convert to fraction form
    53,968.80/80,893.80 = 18,890.40/x
  3. Step 3: Cross multiply
    53,968.80x = 80,893.80 × 18,890.40
  4. Step 4: Simplify right side
    53,968.80x = 1,528,116,239.52
  5. Step 5: Solve for x
    x = 1,528,116,239.52/53,968.80
  6. Step 6: Final answer
    x = 28,314.81

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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.