Home / 78,682.50-117,937.89-38,728.98

Finding the Fourth Proportional to 78,682.50, 117,937.89 and 38,728.98

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Solution

The fourth proportional to 78,682.50, 117,937.89 and 38,728.98 is: 58,051.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.50 : 117,937.89 = 38,728.98 : x
  2. Step 2: Convert to fraction form
    78,682.50/117,937.89 = 38,728.98/x
  3. Step 3: Cross multiply
    78,682.50x = 117,937.89 × 38,728.98
  4. Step 4: Simplify right side
    78,682.50x = 4,567,614,183.05
  5. Step 5: Solve for x
    x = 4,567,614,183.05/78,682.50
  6. Step 6: Final answer
    x = 58,051.21

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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.