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Finding the Fourth Proportional to 136,036.92, 187,677 and 78,665.64

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Solution

The fourth proportional to 136,036.92, 187,677 and 78,665.64 is: 108,527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,036.92 : 187,677 = 78,665.64 : x
  2. Step 2: Convert to fraction form
    136,036.92/187,677 = 78,665.64/x
  3. Step 3: Cross multiply
    136,036.92x = 187,677 × 78,665.64
  4. Step 4: Simplify right side
    136,036.92x = 14,763,731,318.28
  5. Step 5: Solve for x
    x = 14,763,731,318.28/136,036.92
  6. Step 6: Final answer
    x = 108,527.39

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1.5x scale

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.