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Finding the Fourth Proportional to 426,639.18, 639,995.52 and 111,096.66

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Solution

The fourth proportional to 426,639.18, 639,995.52 and 111,096.66 is: 166,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,639.18 : 639,995.52 = 111,096.66 : x
  2. Step 2: Convert to fraction form
    426,639.18/639,995.52 = 111,096.66/x
  3. Step 3: Cross multiply
    426,639.18x = 639,995.52 × 111,096.66
  4. Step 4: Simplify right side
    426,639.18x = 71,101,364,686.96
  5. Step 5: Solve for x
    x = 71,101,364,686.96/426,639.18
  6. Step 6: Final answer
    x = 166,654.56

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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.