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Finding the Fourth Proportional to 78,751.47, 118,092.57 and 28,818.60

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Solution

The fourth proportional to 78,751.47, 118,092.57 and 28,818.60 is: 43,215.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,751.47 : 118,092.57 = 28,818.60 : x
  2. Step 2: Convert to fraction form
    78,751.47/118,092.57 = 28,818.60/x
  3. Step 3: Cross multiply
    78,751.47x = 118,092.57 × 28,818.60
  4. Step 4: Simplify right side
    78,751.47x = 3,403,262,537.80
  5. Step 5: Solve for x
    x = 3,403,262,537.80/78,751.47
  6. Step 6: Final answer
    x = 43,215.23

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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.