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Finding the Fourth Proportional to 666,765.40, 1,000,148.10 and 168,129.40

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Solution

The fourth proportional to 666,765.40, 1,000,148.10 and 168,129.40 is: 252,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,765.40 : 1,000,148.10 = 168,129.40 : x
  2. Step 2: Convert to fraction form
    666,765.40/1,000,148.10 = 168,129.40/x
  3. Step 3: Cross multiply
    666,765.40x = 1,000,148.10 × 168,129.40
  4. Step 4: Simplify right side
    666,765.40x = 168,154,299,964.14
  5. Step 5: Solve for x
    x = 168,154,299,964.14/666,765.40
  6. Step 6: Final answer
    x = 252,194.10

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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.