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Finding the Fourth Proportional to 125,318.50, 172,939.62 and 68,730.10

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Solution

The fourth proportional to 125,318.50, 172,939.62 and 68,730.10 is: 94,847.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,318.50 : 172,939.62 = 68,730.10 : x
  2. Step 2: Convert to fraction form
    125,318.50/172,939.62 = 68,730.10/x
  3. Step 3: Cross multiply
    125,318.50x = 172,939.62 × 68,730.10
  4. Step 4: Simplify right side
    125,318.50x = 11,886,157,376.56
  5. Step 5: Solve for x
    x = 11,886,157,376.56/125,318.50
  6. Step 6: Final answer
    x = 94,847.59

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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.