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Finding the Fourth Proportional to 79,451.53, 109,640.16 and 43,639.40

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Solution

The fourth proportional to 79,451.53, 109,640.16 and 43,639.40 is: 60,220.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,451.53 : 109,640.16 = 43,639.40 : x
  2. Step 2: Convert to fraction form
    79,451.53/109,640.16 = 43,639.40/x
  3. Step 3: Cross multiply
    79,451.53x = 109,640.16 × 43,639.40
  4. Step 4: Simplify right side
    79,451.53x = 4,784,631,181.50
  5. Step 5: Solve for x
    x = 4,784,631,181.50/79,451.53
  6. Step 6: Final answer
    x = 60,220.76

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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.