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Finding the Fourth Proportional to 92,876, 128,169.40 and 50,434.52

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Solution

The fourth proportional to 92,876, 128,169.40 and 50,434.52 is: 69,599.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,876 : 128,169.40 = 50,434.52 : x
  2. Step 2: Convert to fraction form
    92,876/128,169.40 = 50,434.52/x
  3. Step 3: Cross multiply
    92,876x = 128,169.40 × 50,434.52
  4. Step 4: Simplify right side
    92,876x = 6,464,162,167.69
  5. Step 5: Solve for x
    x = 6,464,162,167.69/92,876
  6. Step 6: Final answer
    x = 69,599.92

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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.