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Finding the Fourth Proportional to 125,157.78, 172,722.04 and 68,569.16

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Solution

The fourth proportional to 125,157.78, 172,722.04 and 68,569.16 is: 94,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,157.78 : 172,722.04 = 68,569.16 : x
  2. Step 2: Convert to fraction form
    125,157.78/172,722.04 = 68,569.16/x
  3. Step 3: Cross multiply
    125,157.78x = 172,722.04 × 68,569.16
  4. Step 4: Simplify right side
    125,157.78x = 11,843,404,161.25
  5. Step 5: Solve for x
    x = 11,843,404,161.25/125,157.78
  6. Step 6: Final answer
    x = 94,627.79

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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.