Home / 78,402.27-117,836.69-36,878.43

Finding the Fourth Proportional to 78,402.27, 117,836.69 and 36,878.43

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Solution

The fourth proportional to 78,402.27, 117,836.69 and 36,878.43 is: 55,427.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,402.27 : 117,836.69 = 36,878.43 : x
  2. Step 2: Convert to fraction form
    78,402.27/117,836.69 = 36,878.43/x
  3. Step 3: Cross multiply
    78,402.27x = 117,836.69 × 36,878.43
  4. Step 4: Simplify right side
    78,402.27x = 4,345,631,939.20
  5. Step 5: Solve for x
    x = 4,345,631,939.20/78,402.27
  6. Step 6: Final answer
    x = 55,427.37

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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.