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Finding the Fourth Proportional to 125,005.62, 172,501.11 and 68,406.06

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Solution

The fourth proportional to 125,005.62, 172,501.11 and 68,406.06 is: 94,396.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,005.62 : 172,501.11 = 68,406.06 : x
  2. Step 2: Convert to fraction form
    125,005.62/172,501.11 = 68,406.06/x
  3. Step 3: Cross multiply
    125,005.62x = 172,501.11 × 68,406.06
  4. Step 4: Simplify right side
    125,005.62x = 11,800,121,280.73
  5. Step 5: Solve for x
    x = 11,800,121,280.73/125,005.62
  6. Step 6: Final answer
    x = 94,396.73

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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.