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Finding the Fourth Proportional to 79,892.80, 119,693.40 and 48,691.60

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Solution

The fourth proportional to 79,892.80, 119,693.40 and 48,691.60 is: 72,948.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,892.80 : 119,693.40 = 48,691.60 : x
  2. Step 2: Convert to fraction form
    79,892.80/119,693.40 = 48,691.60/x
  3. Step 3: Cross multiply
    79,892.80x = 119,693.40 × 48,691.60
  4. Step 4: Simplify right side
    79,892.80x = 5,828,063,155.44
  5. Step 5: Solve for x
    x = 5,828,063,155.44/79,892.80
  6. Step 6: Final answer
    x = 72,948.54

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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.