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Finding the Fourth Proportional to 125,115.12, 172,656.36 and 68,526

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Solution

The fourth proportional to 125,115.12, 172,656.36 and 68,526 is: 94,564.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,115.12 : 172,656.36 = 68,526 : x
  2. Step 2: Convert to fraction form
    125,115.12/172,656.36 = 68,526/x
  3. Step 3: Cross multiply
    125,115.12x = 172,656.36 × 68,526
  4. Step 4: Simplify right side
    125,115.12x = 11,831,449,725.36
  5. Step 5: Solve for x
    x = 11,831,449,725.36/125,115.12
  6. Step 6: Final answer
    x = 94,564.51

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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.