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Finding the Fourth Proportional to 79,117.76, 109,179.79 and 45,137.24

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Solution

The fourth proportional to 79,117.76, 109,179.79 and 45,137.24 is: 62,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,117.76 : 109,179.79 = 45,137.24 : x
  2. Step 2: Convert to fraction form
    79,117.76/109,179.79 = 45,137.24/x
  3. Step 3: Cross multiply
    79,117.76x = 109,179.79 × 45,137.24
  4. Step 4: Simplify right side
    79,117.76x = 4,928,074,749.20
  5. Step 5: Solve for x
    x = 4,928,074,749.20/79,117.76
  6. Step 6: Final answer
    x = 62,287.85

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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.