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Finding the Fourth Proportional to 425,305.36, 638,093.52 and 125,787.76

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Solution

The fourth proportional to 425,305.36, 638,093.52 and 125,787.76 is: 188,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,305.36 : 638,093.52 = 125,787.76 : x
  2. Step 2: Convert to fraction form
    425,305.36/638,093.52 = 125,787.76/x
  3. Step 3: Cross multiply
    425,305.36x = 638,093.52 × 125,787.76
  4. Step 4: Simplify right side
    425,305.36x = 80,264,354,551.32
  5. Step 5: Solve for x
    x = 80,264,354,551.32/425,305.36
  6. Step 6: Final answer
    x = 188,721.71

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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.