Home / 117,780.25-162,511.07-66,781.47

Finding the Fourth Proportional to 117,780.25, 162,511.07 and 66,781.47

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Solution

The fourth proportional to 117,780.25, 162,511.07 and 66,781.47 is: 92,143.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,780.25 : 162,511.07 = 66,781.47 : x
  2. Step 2: Convert to fraction form
    117,780.25/162,511.07 = 66,781.47/x
  3. Step 3: Cross multiply
    117,780.25x = 162,511.07 × 66,781.47
  4. Step 4: Simplify right side
    117,780.25x = 10,852,728,145.87
  5. Step 5: Solve for x
    x = 10,852,728,145.87/117,780.25
  6. Step 6: Final answer
    x = 92,143.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.