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Finding the Fourth Proportional to 666,645.48, 999,974.70 and 168,009.48

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Solution

The fourth proportional to 666,645.48, 999,974.70 and 168,009.48 is: 252,015.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,645.48 : 999,974.70 = 168,009.48 : x
  2. Step 2: Convert to fraction form
    666,645.48/999,974.70 = 168,009.48/x
  3. Step 3: Cross multiply
    666,645.48x = 999,974.70 × 168,009.48
  4. Step 4: Simplify right side
    666,645.48x = 168,005,229,360.16
  5. Step 5: Solve for x
    x = 168,005,229,360.16/666,645.48
  6. Step 6: Final answer
    x = 252,015.85

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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.