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Finding the Fourth Proportional to 79,718.72, 119,561.76 and 29,789.60

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Solution

The fourth proportional to 79,718.72, 119,561.76 and 29,789.60 is: 44,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,718.72 : 119,561.76 = 29,789.60 : x
  2. Step 2: Convert to fraction form
    79,718.72/119,561.76 = 29,789.60/x
  3. Step 3: Cross multiply
    79,718.72x = 119,561.76 × 29,789.60
  4. Step 4: Simplify right side
    79,718.72x = 3,561,697,005.70
  5. Step 5: Solve for x
    x = 3,561,697,005.70/79,718.72
  6. Step 6: Final answer
    x = 44,678.30

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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.