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Finding the Fourth Proportional to 78,479.73, 117,793.58 and 28,608.03

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Solution

The fourth proportional to 78,479.73, 117,793.58 and 28,608.03 is: 42,939.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,479.73 : 117,793.58 = 28,608.03 : x
  2. Step 2: Convert to fraction form
    78,479.73/117,793.58 = 28,608.03/x
  3. Step 3: Cross multiply
    78,479.73x = 117,793.58 × 28,608.03
  4. Step 4: Simplify right side
    78,479.73x = 3,369,842,127.41
  5. Step 5: Solve for x
    x = 3,369,842,127.41/78,479.73
  6. Step 6: Final answer
    x = 42,939.01

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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.