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Finding the Fourth Proportional to 125,105.28, 172,656.72 and 68,524.80

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Solution

The fourth proportional to 125,105.28, 172,656.72 and 68,524.80 is: 94,570.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,105.28 : 172,656.72 = 68,524.80 : x
  2. Step 2: Convert to fraction form
    125,105.28/172,656.72 = 68,524.80/x
  3. Step 3: Cross multiply
    125,105.28x = 172,656.72 × 68,524.80
  4. Step 4: Simplify right side
    125,105.28x = 11,831,267,206.66
  5. Step 5: Solve for x
    x = 11,831,267,206.66/125,105.28
  6. Step 6: Final answer
    x = 94,570.49

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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.