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Finding the Fourth Proportional to 90,196.64, 124,404 and 79,999.52

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Solution

The fourth proportional to 90,196.64, 124,404 and 79,999.52 is: 110,339.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,196.64 : 124,404 = 79,999.52 : x
  2. Step 2: Convert to fraction form
    90,196.64/124,404 = 79,999.52/x
  3. Step 3: Cross multiply
    90,196.64x = 124,404 × 79,999.52
  4. Step 4: Simplify right side
    90,196.64x = 9,952,260,286.08
  5. Step 5: Solve for x
    x = 9,952,260,286.08/90,196.64
  6. Step 6: Final answer
    x = 110,339.59

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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.