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Finding the Fourth Proportional to 423,728.76, 635,593.14 and 108,174.36

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Solution

The fourth proportional to 423,728.76, 635,593.14 and 108,174.36 is: 162,261.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,728.76 : 635,593.14 = 108,174.36 : x
  2. Step 2: Convert to fraction form
    423,728.76/635,593.14 = 108,174.36/x
  3. Step 3: Cross multiply
    423,728.76x = 635,593.14 × 108,174.36
  4. Step 4: Simplify right side
    423,728.76x = 68,754,881,139.89
  5. Step 5: Solve for x
    x = 68,754,881,139.89/423,728.76
  6. Step 6: Final answer
    x = 162,261.54

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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.