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Finding the Fourth Proportional to 172,710.84, 259,101.16 and 72,871.26

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Solution

The fourth proportional to 172,710.84, 259,101.16 and 72,871.26 is: 109,321.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,710.84 : 259,101.16 = 72,871.26 : x
  2. Step 2: Convert to fraction form
    172,710.84/259,101.16 = 72,871.26/x
  3. Step 3: Cross multiply
    172,710.84x = 259,101.16 × 72,871.26
  4. Step 4: Simplify right side
    172,710.84x = 18,881,027,996.66
  5. Step 5: Solve for x
    x = 18,881,027,996.66/172,710.84
  6. Step 6: Final answer
    x = 109,321.62

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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.