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Finding the Fourth Proportional to 423,689.28, 635,555.78 and 108,148.92

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Solution

The fourth proportional to 423,689.28, 635,555.78 and 108,148.92 is: 162,228.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,689.28 : 635,555.78 = 108,148.92 : x
  2. Step 2: Convert to fraction form
    423,689.28/635,555.78 = 108,148.92/x
  3. Step 3: Cross multiply
    423,689.28x = 635,555.78 × 108,148.92
  4. Step 4: Simplify right side
    423,689.28x = 68,734,671,206.76
  5. Step 5: Solve for x
    x = 68,734,671,206.76/423,689.28
  6. Step 6: Final answer
    x = 162,228.96

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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.