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Finding the Fourth Proportional to 74,787.84, 112,148.89 and 28,007.91

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Solution

The fourth proportional to 74,787.84, 112,148.89 and 28,007.91 is: 41,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,787.84 : 112,148.89 = 28,007.91 : x
  2. Step 2: Convert to fraction form
    74,787.84/112,148.89 = 28,007.91/x
  3. Step 3: Cross multiply
    74,787.84x = 112,148.89 × 28,007.91
  4. Step 4: Simplify right side
    74,787.84x = 3,141,055,947.70
  5. Step 5: Solve for x
    x = 3,141,055,947.70/74,787.84
  6. Step 6: Final answer
    x = 41,999.55

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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.