Home / 78,581.36-108,438.96-42,771.44

Finding the Fourth Proportional to 78,581.36, 108,438.96 and 42,771.44

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Solution

The fourth proportional to 78,581.36, 108,438.96 and 42,771.44 is: 59,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581.36 : 108,438.96 = 42,771.44 : x
  2. Step 2: Convert to fraction form
    78,581.36/108,438.96 = 42,771.44/x
  3. Step 3: Cross multiply
    78,581.36x = 108,438.96 × 42,771.44
  4. Step 4: Simplify right side
    78,581.36x = 4,638,090,471.30
  5. Step 5: Solve for x
    x = 4,638,090,471.30/78,581.36
  6. Step 6: Final answer
    x = 59,022.78

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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.