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Finding the Fourth Proportional to 117,321.41, 161,891.42 and 72,001.30

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Solution

The fourth proportional to 117,321.41, 161,891.42 and 72,001.30 is: 99,354.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,321.41 : 161,891.42 = 72,001.30 : x
  2. Step 2: Convert to fraction form
    117,321.41/161,891.42 = 72,001.30/x
  3. Step 3: Cross multiply
    117,321.41x = 161,891.42 × 72,001.30
  4. Step 4: Simplify right side
    117,321.41x = 11,656,392,698.85
  5. Step 5: Solve for x
    x = 11,656,392,698.85/117,321.41
  6. Step 6: Final answer
    x = 99,354.35

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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.