Home / 78,131.52-117,211.86-25,543.89

Finding the Fourth Proportional to 78,131.52, 117,211.86 and 25,543.89

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Solution

The fourth proportional to 78,131.52, 117,211.86 and 25,543.89 is: 38,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,131.52 : 117,211.86 = 25,543.89 : x
  2. Step 2: Convert to fraction form
    78,131.52/117,211.86 = 25,543.89/x
  3. Step 3: Cross multiply
    78,131.52x = 117,211.86 × 25,543.89
  4. Step 4: Simplify right side
    78,131.52x = 2,994,046,858.54
  5. Step 5: Solve for x
    x = 2,994,046,858.54/78,131.52
  6. Step 6: Final answer
    x = 38,320.60

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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.