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Finding the Fourth Proportional to 172,753.13, 259,071.81 and 66,112.31

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Solution

The fourth proportional to 172,753.13, 259,071.81 and 66,112.31 is: 99,146.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,753.13 : 259,071.81 = 66,112.31 : x
  2. Step 2: Convert to fraction form
    172,753.13/259,071.81 = 66,112.31/x
  3. Step 3: Cross multiply
    172,753.13x = 259,071.81 × 66,112.31
  4. Step 4: Simplify right side
    172,753.13x = 17,127,835,814.98
  5. Step 5: Solve for x
    x = 17,127,835,814.98/172,753.13
  6. Step 6: Final answer
    x = 99,146.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.