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Finding the Fourth Proportional to 172,917.76, 259,228.80 and 66,378.24

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Solution

The fourth proportional to 172,917.76, 259,228.80 and 66,378.24 is: 99,510.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,917.76 : 259,228.80 = 66,378.24 : x
  2. Step 2: Convert to fraction form
    172,917.76/259,228.80 = 66,378.24/x
  3. Step 3: Cross multiply
    172,917.76x = 259,228.80 × 66,378.24
  4. Step 4: Simplify right side
    172,917.76x = 17,207,151,501.31
  5. Step 5: Solve for x
    x = 17,207,151,501.31/172,917.76
  6. Step 6: Final answer
    x = 99,510.61

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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.