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Finding the Fourth Proportional to 78,751.44, 118,088.28 and 28,793.88

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Solution

The fourth proportional to 78,751.44, 118,088.28 and 28,793.88 is: 43,176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,751.44 : 118,088.28 = 28,793.88 : x
  2. Step 2: Convert to fraction form
    78,751.44/118,088.28 = 28,793.88/x
  3. Step 3: Cross multiply
    78,751.44x = 118,088.28 × 28,793.88
  4. Step 4: Simplify right side
    78,751.44x = 3,400,219,763.73
  5. Step 5: Solve for x
    x = 3,400,219,763.73/78,751.44
  6. Step 6: Final answer
    x = 43,176.60

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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.