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Finding the Fourth Proportional to 131,627, 181,645.26 and 72,011

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Solution

The fourth proportional to 131,627, 181,645.26 and 72,011 is: 99,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,627 : 181,645.26 = 72,011 : x
  2. Step 2: Convert to fraction form
    131,627/181,645.26 = 72,011/x
  3. Step 3: Cross multiply
    131,627x = 181,645.26 × 72,011
  4. Step 4: Simplify right side
    131,627x = 13,080,456,817.86
  5. Step 5: Solve for x
    x = 13,080,456,817.86/131,627
  6. Step 6: Final answer
    x = 99,375.18

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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.