Home / 78,391.15-108,181.80-42,583.21

Finding the Fourth Proportional to 78,391.15, 108,181.80 and 42,583.21

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Solution

The fourth proportional to 78,391.15, 108,181.80 and 42,583.21 is: 58,765.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,391.15 : 108,181.80 = 42,583.21 : x
  2. Step 2: Convert to fraction form
    78,391.15/108,181.80 = 42,583.21/x
  3. Step 3: Cross multiply
    78,391.15x = 108,181.80 × 42,583.21
  4. Step 4: Simplify right side
    78,391.15x = 4,606,727,553.75
  5. Step 5: Solve for x
    x = 4,606,727,553.75/78,391.15
  6. Step 6: Final answer
    x = 58,765.92

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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.