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Finding the Fourth Proportional to 666,751.80, 1,000,127.70 and 168,115.80

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Solution

The fourth proportional to 666,751.80, 1,000,127.70 and 168,115.80 is: 252,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,751.80 : 1,000,127.70 = 168,115.80 : x
  2. Step 2: Convert to fraction form
    666,751.80/1,000,127.70 = 168,115.80/x
  3. Step 3: Cross multiply
    666,751.80x = 1,000,127.70 × 168,115.80
  4. Step 4: Simplify right side
    666,751.80x = 168,137,268,387.66
  5. Step 5: Solve for x
    x = 168,137,268,387.66/666,751.80
  6. Step 6: Final answer
    x = 252,173.70

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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.