Home / 78,279.96-117,395.40-25,677.24

Finding the Fourth Proportional to 78,279.96, 117,395.40 and 25,677.24

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Solution

The fourth proportional to 78,279.96, 117,395.40 and 25,677.24 is: 38,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.96 : 117,395.40 = 25,677.24 : x
  2. Step 2: Convert to fraction form
    78,279.96/117,395.40 = 25,677.24/x
  3. Step 3: Cross multiply
    78,279.96x = 117,395.40 × 25,677.24
  4. Step 4: Simplify right side
    78,279.96x = 3,014,389,860.70
  5. Step 5: Solve for x
    x = 3,014,389,860.70/78,279.96
  6. Step 6: Final answer
    x = 38,507.81

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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.