Home / 78,581.44-108,439.04-42,771.52

Finding the Fourth Proportional to 78,581.44, 108,439.04 and 42,771.52

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Solution

The fourth proportional to 78,581.44, 108,439.04 and 42,771.52 is: 59,022.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581.44 : 108,439.04 = 42,771.52 : x
  2. Step 2: Convert to fraction form
    78,581.44/108,439.04 = 42,771.52/x
  3. Step 3: Cross multiply
    78,581.44x = 108,439.04 × 42,771.52
  4. Step 4: Simplify right side
    78,581.44x = 4,638,102,568.14
  5. Step 5: Solve for x
    x = 4,638,102,568.14/78,581.44
  6. Step 6: Final answer
    x = 59,022.88

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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.