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Finding the Fourth Proportional to 136,034.92, 187,674.24 and 78,663.64

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Solution

The fourth proportional to 136,034.92, 187,674.24 and 78,663.64 is: 108,524.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,034.92 : 187,674.24 = 78,663.64 : x
  2. Step 2: Convert to fraction form
    136,034.92/187,674.24 = 78,663.64/x
  3. Step 3: Cross multiply
    136,034.92x = 187,674.24 × 78,663.64
  4. Step 4: Simplify right side
    136,034.92x = 14,763,138,852.63
  5. Step 5: Solve for x
    x = 14,763,138,852.63/136,034.92
  6. Step 6: Final answer
    x = 108,524.63

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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.