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Finding the Fourth Proportional to 75,178.87, 112,724.56 and 28,435.39

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Solution

The fourth proportional to 75,178.87, 112,724.56 and 28,435.39 is: 42,636.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,178.87 : 112,724.56 = 28,435.39 : x
  2. Step 2: Convert to fraction form
    75,178.87/112,724.56 = 28,435.39/x
  3. Step 3: Cross multiply
    75,178.87x = 112,724.56 × 28,435.39
  4. Step 4: Simplify right side
    75,178.87x = 3,205,366,579.91
  5. Step 5: Solve for x
    x = 3,205,366,579.91/75,178.87
  6. Step 6: Final answer
    x = 42,636.54

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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.