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Finding the Fourth Proportional to 424,648.76, 636,973.18 and 109,105.68

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Solution

The fourth proportional to 424,648.76, 636,973.18 and 109,105.68 is: 163,658.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,648.76 : 636,973.18 = 109,105.68 : x
  2. Step 2: Convert to fraction form
    424,648.76/636,973.18 = 109,105.68/x
  3. Step 3: Cross multiply
    424,648.76x = 636,973.18 × 109,105.68
  4. Step 4: Simplify right side
    424,648.76x = 69,497,391,945.66
  5. Step 5: Solve for x
    x = 69,497,391,945.66/424,648.76
  6. Step 6: Final answer
    x = 163,658.53

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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.