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Finding the Fourth Proportional to 250,717.88, 345,999.66 and 137,543.96

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Solution

The fourth proportional to 250,717.88, 345,999.66 and 137,543.96 is: 189,815.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,717.88 : 345,999.66 = 137,543.96 : x
  2. Step 2: Convert to fraction form
    250,717.88/345,999.66 = 137,543.96/x
  3. Step 3: Cross multiply
    250,717.88x = 345,999.66 × 137,543.96
  4. Step 4: Simplify right side
    250,717.88x = 47,590,163,395.05
  5. Step 5: Solve for x
    x = 47,590,163,395.05/250,717.88
  6. Step 6: Final answer
    x = 189,815.59

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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.