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Finding the Fourth Proportional to 74,787.52, 112,168.32 and 19,383.52

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Solution

The fourth proportional to 74,787.52, 112,168.32 and 19,383.52 is: 29,071.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,787.52 : 112,168.32 = 19,383.52 : x
  2. Step 2: Convert to fraction form
    74,787.52/112,168.32 = 19,383.52/x
  3. Step 3: Cross multiply
    74,787.52x = 112,168.32 × 19,383.52
  4. Step 4: Simplify right side
    74,787.52x = 2,174,216,874.09
  5. Step 5: Solve for x
    x = 2,174,216,874.09/74,787.52
  6. Step 6: Final answer
    x = 29,071.92

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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.