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Finding the Fourth Proportional to 78,871.20, 118,391.04 and 43,801.44

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Solution

The fourth proportional to 78,871.20, 118,391.04 and 43,801.44 is: 65,748.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.20 : 118,391.04 = 43,801.44 : x
  2. Step 2: Convert to fraction form
    78,871.20/118,391.04 = 43,801.44/x
  3. Step 3: Cross multiply
    78,871.20x = 118,391.04 × 43,801.44
  4. Step 4: Simplify right side
    78,871.20x = 5,185,698,035.10
  5. Step 5: Solve for x
    x = 5,185,698,035.10/78,871.20
  6. Step 6: Final answer
    x = 65,748.94

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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.