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Finding the Fourth Proportional to 173,428.92, 259,985.58 and 66,744.78

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Solution

The fourth proportional to 173,428.92, 259,985.58 and 66,744.78 is: 100,056.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,428.92 : 259,985.58 = 66,744.78 : x
  2. Step 2: Convert to fraction form
    173,428.92/259,985.58 = 66,744.78/x
  3. Step 3: Cross multiply
    173,428.92x = 259,985.58 × 66,744.78
  4. Step 4: Simplify right side
    173,428.92x = 17,352,680,340.27
  5. Step 5: Solve for x
    x = 17,352,680,340.27/173,428.92
  6. Step 6: Final answer
    x = 100,056.44

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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.