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Finding the Fourth Proportional to 426,643.18, 640,001.52 and 111,100.66

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Solution

The fourth proportional to 426,643.18, 640,001.52 and 111,100.66 is: 166,660.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,643.18 : 640,001.52 = 111,100.66 : x
  2. Step 2: Convert to fraction form
    426,643.18/640,001.52 = 111,100.66/x
  3. Step 3: Cross multiply
    426,643.18x = 640,001.52 × 111,100.66
  4. Step 4: Simplify right side
    426,643.18x = 71,104,591,273.00
  5. Step 5: Solve for x
    x = 71,104,591,273.00/426,643.18
  6. Step 6: Final answer
    x = 166,660.56

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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.