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Finding the Fourth Proportional to 78,855.72, 108,821.20 and 43,046.52

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Solution

The fourth proportional to 78,855.72, 108,821.20 and 43,046.52 is: 59,404.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.72 : 108,821.20 = 43,046.52 : x
  2. Step 2: Convert to fraction form
    78,855.72/108,821.20 = 43,046.52/x
  3. Step 3: Cross multiply
    78,855.72x = 108,821.20 × 43,046.52
  4. Step 4: Simplify right side
    78,855.72x = 4,684,373,962.22
  5. Step 5: Solve for x
    x = 4,684,373,962.22/78,855.72
  6. Step 6: Final answer
    x = 59,404.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.