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Finding the Fourth Proportional to 125,107.50, 172,648.36 and 68,520.90

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Solution

The fourth proportional to 125,107.50, 172,648.36 and 68,520.90 is: 94,558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,107.50 : 172,648.36 = 68,520.90 : x
  2. Step 2: Convert to fraction form
    125,107.50/172,648.36 = 68,520.90/x
  3. Step 3: Cross multiply
    125,107.50x = 172,648.36 × 68,520.90
  4. Step 4: Simplify right side
    125,107.50x = 11,830,021,010.72
  5. Step 5: Solve for x
    x = 11,830,021,010.72/125,107.50
  6. Step 6: Final answer
    x = 94,558.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.