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Finding the Fourth Proportional to 125,211.78, 172,796.58 and 68,623.20

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Solution

The fourth proportional to 125,211.78, 172,796.58 and 68,623.20 is: 94,702.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,211.78 : 172,796.58 = 68,623.20 : x
  2. Step 2: Convert to fraction form
    125,211.78/172,796.58 = 68,623.20/x
  3. Step 3: Cross multiply
    125,211.78x = 172,796.58 × 68,623.20
  4. Step 4: Simplify right side
    125,211.78x = 11,857,854,268.66
  5. Step 5: Solve for x
    x = 11,857,854,268.66/125,211.78
  6. Step 6: Final answer
    x = 94,702.39

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1.5x scale

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.