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Finding the Fourth Proportional to 666,643.98, 999,972.45 and 168,007.98

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Solution

The fourth proportional to 666,643.98, 999,972.45 and 168,007.98 is: 252,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,643.98 : 999,972.45 = 168,007.98 : x
  2. Step 2: Convert to fraction form
    666,643.98/999,972.45 = 168,007.98/x
  3. Step 3: Cross multiply
    666,643.98x = 999,972.45 × 168,007.98
  4. Step 4: Simplify right side
    666,643.98x = 168,003,351,380.15
  5. Step 5: Solve for x
    x = 168,003,351,380.15/666,643.98
  6. Step 6: Final answer
    x = 252,013.60

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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.