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Finding the Fourth Proportional to 423,660.40, 635,490.15 and 108,117.28

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Solution

The fourth proportional to 423,660.40, 635,490.15 and 108,117.28 is: 162,175.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,660.40 : 635,490.15 = 108,117.28 : x
  2. Step 2: Convert to fraction form
    423,660.40/635,490.15 = 108,117.28/x
  3. Step 3: Cross multiply
    423,660.40x = 635,490.15 × 108,117.28
  4. Step 4: Simplify right side
    423,660.40x = 68,707,466,484.79
  5. Step 5: Solve for x
    x = 68,707,466,484.79/423,660.40
  6. Step 6: Final answer
    x = 162,175.81

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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.