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Finding the Fourth Proportional to 79,676.12, 109,952.16 and 43,865.40

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Solution

The fourth proportional to 79,676.12, 109,952.16 and 43,865.40 is: 60,533.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,676.12 : 109,952.16 = 43,865.40 : x
  2. Step 2: Convert to fraction form
    79,676.12/109,952.16 = 43,865.40/x
  3. Step 3: Cross multiply
    79,676.12x = 109,952.16 × 43,865.40
  4. Step 4: Simplify right side
    79,676.12x = 4,823,095,479.26
  5. Step 5: Solve for x
    x = 4,823,095,479.26/79,676.12
  6. Step 6: Final answer
    x = 60,533.76

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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.