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Finding the Fourth Proportional to 118,574.72, 163,638.32 and 68,289.92

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Solution

The fourth proportional to 118,574.72, 163,638.32 and 68,289.92 is: 94,243.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,574.72 : 163,638.32 = 68,289.92 : x
  2. Step 2: Convert to fraction form
    118,574.72/163,638.32 = 68,289.92/x
  3. Step 3: Cross multiply
    118,574.72x = 163,638.32 × 68,289.92
  4. Step 4: Simplify right side
    118,574.72x = 11,174,847,781.73
  5. Step 5: Solve for x
    x = 11,174,847,781.73/118,574.72
  6. Step 6: Final answer
    x = 94,243.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.