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Finding the Fourth Proportional to 79,685.26, 109,964.46 and 47,442.40

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Solution

The fourth proportional to 79,685.26, 109,964.46 and 47,442.40 is: 65,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,685.26 : 109,964.46 = 47,442.40 : x
  2. Step 2: Convert to fraction form
    79,685.26/109,964.46 = 47,442.40/x
  3. Step 3: Cross multiply
    79,685.26x = 109,964.46 × 47,442.40
  4. Step 4: Simplify right side
    79,685.26x = 5,216,977,897.10
  5. Step 5: Solve for x
    x = 5,216,977,897.10/79,685.26
  6. Step 6: Final answer
    x = 65,469.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.