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Finding the Fourth Proportional to 666,745.80, 1,000,118.70 and 168,109.80

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Solution

The fourth proportional to 666,745.80, 1,000,118.70 and 168,109.80 is: 252,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,745.80 : 1,000,118.70 = 168,109.80 : x
  2. Step 2: Convert to fraction form
    666,745.80/1,000,118.70 = 168,109.80/x
  3. Step 3: Cross multiply
    666,745.80x = 1,000,118.70 × 168,109.80
  4. Step 4: Simplify right side
    666,745.80x = 168,129,754,633.26
  5. Step 5: Solve for x
    x = 168,129,754,633.26/666,745.80
  6. Step 6: Final answer
    x = 252,164.70

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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.