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Finding the Fourth Proportional to 92,873.52, 128,198.16 and 55,147.50

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Solution

The fourth proportional to 92,873.52, 128,198.16 and 55,147.50 is: 76,122.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,873.52 : 128,198.16 = 55,147.50 : x
  2. Step 2: Convert to fraction form
    92,873.52/128,198.16 = 55,147.50/x
  3. Step 3: Cross multiply
    92,873.52x = 128,198.16 × 55,147.50
  4. Step 4: Simplify right side
    92,873.52x = 7,069,808,028.60
  5. Step 5: Solve for x
    x = 7,069,808,028.60/92,873.52
  6. Step 6: Final answer
    x = 76,122.97

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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.