Home / 78,162.40-117,268.71-25,559.92

Finding the Fourth Proportional to 78,162.40, 117,268.71 and 25,559.92

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Solution

The fourth proportional to 78,162.40, 117,268.71 and 25,559.92 is: 38,348.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,162.40 : 117,268.71 = 25,559.92 : x
  2. Step 2: Convert to fraction form
    78,162.40/117,268.71 = 25,559.92/x
  3. Step 3: Cross multiply
    78,162.40x = 117,268.71 × 25,559.92
  4. Step 4: Simplify right side
    78,162.40x = 2,997,378,846.10
  5. Step 5: Solve for x
    x = 2,997,378,846.10/78,162.40
  6. Step 6: Final answer
    x = 38,348.09

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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.