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Finding the Fourth Proportional to 125,358.78, 172,992.15 and 68,769.66

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Solution

The fourth proportional to 125,358.78, 172,992.15 and 68,769.66 is: 94,900.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,358.78 : 172,992.15 = 68,769.66 : x
  2. Step 2: Convert to fraction form
    125,358.78/172,992.15 = 68,769.66/x
  3. Step 3: Cross multiply
    125,358.78x = 172,992.15 × 68,769.66
  4. Step 4: Simplify right side
    125,358.78x = 11,896,611,338.17
  5. Step 5: Solve for x
    x = 11,896,611,338.17/125,358.78
  6. Step 6: Final answer
    x = 94,900.50

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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.