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Finding the Fourth Proportional to 142,671.88, 213,853.37 and 92,787.78

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Solution

The fourth proportional to 142,671.88, 213,853.37 and 92,787.78 is: 139,081.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,671.88 : 213,853.37 = 92,787.78 : x
  2. Step 2: Convert to fraction form
    142,671.88/213,853.37 = 92,787.78/x
  3. Step 3: Cross multiply
    142,671.88x = 213,853.37 × 92,787.78
  4. Step 4: Simplify right side
    142,671.88x = 19,842,978,582.90
  5. Step 5: Solve for x
    x = 19,842,978,582.90/142,671.88
  6. Step 6: Final answer
    x = 139,081.21

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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.