Home / 78,644.16-117,861.12-28,677.36

Finding the Fourth Proportional to 78,644.16, 117,861.12 and 28,677.36

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Solution

The fourth proportional to 78,644.16, 117,861.12 and 28,677.36 is: 42,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,644.16 : 117,861.12 = 28,677.36 : x
  2. Step 2: Convert to fraction form
    78,644.16/117,861.12 = 28,677.36/x
  3. Step 3: Cross multiply
    78,644.16x = 117,861.12 × 28,677.36
  4. Step 4: Simplify right side
    78,644.16x = 3,379,945,768.24
  5. Step 5: Solve for x
    x = 3,379,945,768.24/78,644.16
  6. Step 6: Final answer
    x = 42,977.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.