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Finding the Fourth Proportional to 79,690.66, 119,460.85 and 39,671.83

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Solution

The fourth proportional to 79,690.66, 119,460.85 and 39,671.83 is: 59,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,690.66 : 119,460.85 = 39,671.83 : x
  2. Step 2: Convert to fraction form
    79,690.66/119,460.85 = 39,671.83/x
  3. Step 3: Cross multiply
    79,690.66x = 119,460.85 × 39,671.83
  4. Step 4: Simplify right side
    79,690.66x = 4,739,230,022.61
  5. Step 5: Solve for x
    x = 4,739,230,022.61/79,690.66
  6. Step 6: Final answer
    x = 59,470.33

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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.