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Finding the Fourth Proportional to 109,628, 151,431.86 and 88,198.44

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Solution

The fourth proportional to 109,628, 151,431.86 and 88,198.44 is: 121,830.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,628 : 151,431.86 = 88,198.44 : x
  2. Step 2: Convert to fraction form
    109,628/151,431.86 = 88,198.44/x
  3. Step 3: Cross multiply
    109,628x = 151,431.86 × 88,198.44
  4. Step 4: Simplify right side
    109,628x = 13,356,053,818.30
  5. Step 5: Solve for x
    x = 13,356,053,818.30/109,628
  6. Step 6: Final answer
    x = 121,830.68

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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.