Home / 78,239.66-117,379.16-36,149.53

Finding the Fourth Proportional to 78,239.66, 117,379.16 and 36,149.53

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Solution

The fourth proportional to 78,239.66, 117,379.16 and 36,149.53 is: 54,233.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,239.66 : 117,379.16 = 36,149.53 : x
  2. Step 2: Convert to fraction form
    78,239.66/117,379.16 = 36,149.53/x
  3. Step 3: Cross multiply
    78,239.66x = 117,379.16 × 36,149.53
  4. Step 4: Simplify right side
    78,239.66x = 4,243,200,698.15
  5. Step 5: Solve for x
    x = 4,243,200,698.15/78,239.66
  6. Step 6: Final answer
    x = 54,233.37

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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.