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Finding the Fourth Proportional to 79,505.92, 109,720.80 and 43,697.20

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Solution

The fourth proportional to 79,505.92, 109,720.80 and 43,697.20 is: 60,303.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,505.92 : 109,720.80 = 43,697.20 : x
  2. Step 2: Convert to fraction form
    79,505.92/109,720.80 = 43,697.20/x
  3. Step 3: Cross multiply
    79,505.92x = 109,720.80 × 43,697.20
  4. Step 4: Simplify right side
    79,505.92x = 4,794,491,741.76
  5. Step 5: Solve for x
    x = 4,794,491,741.76/79,505.92
  6. Step 6: Final answer
    x = 60,303.58

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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.