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Finding the Fourth Proportional to 125,111.96, 187,584.24 and 68,978.96

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Solution

The fourth proportional to 125,111.96, 187,584.24 and 68,978.96 is: 103,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,111.96 : 187,584.24 = 68,978.96 : x
  2. Step 2: Convert to fraction form
    125,111.96/187,584.24 = 68,978.96/x
  3. Step 3: Cross multiply
    125,111.96x = 187,584.24 × 68,978.96
  4. Step 4: Simplify right side
    125,111.96x = 12,939,365,787.59
  5. Step 5: Solve for x
    x = 12,939,365,787.59/125,111.96
  6. Step 6: Final answer
    x = 103,422.29

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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.