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Finding the Fourth Proportional to 125,354.94, 172,989.86 and 68,766.32

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Solution

The fourth proportional to 125,354.94, 172,989.86 and 68,766.32 is: 94,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,354.94 : 172,989.86 = 68,766.32 : x
  2. Step 2: Convert to fraction form
    125,354.94/172,989.86 = 68,766.32/x
  3. Step 3: Cross multiply
    125,354.94x = 172,989.86 × 68,766.32
  4. Step 4: Simplify right side
    125,354.94x = 11,895,876,069.52
  5. Step 5: Solve for x
    x = 11,895,876,069.52/125,354.94
  6. Step 6: Final answer
    x = 94,897.55

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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.