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Finding the Fourth Proportional to 136,033.92, 187,672.86 and 78,662.64

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Solution

The fourth proportional to 136,033.92, 187,672.86 and 78,662.64 is: 108,523.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,033.92 : 187,672.86 = 78,662.64 : x
  2. Step 2: Convert to fraction form
    136,033.92/187,672.86 = 78,662.64/x
  3. Step 3: Cross multiply
    136,033.92x = 187,672.86 × 78,662.64
  4. Step 4: Simplify right side
    136,033.92x = 14,762,842,623.95
  5. Step 5: Solve for x
    x = 14,762,842,623.95/136,033.92
  6. Step 6: Final answer
    x = 108,523.25

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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.