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Finding the Fourth Proportional to 135,440.64, 186,910.71 and 81,048.74

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Solution

The fourth proportional to 135,440.64, 186,910.71 and 81,048.74 is: 111,848.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,440.64 : 186,910.71 = 81,048.74 : x
  2. Step 2: Convert to fraction form
    135,440.64/186,910.71 = 81,048.74/x
  3. Step 3: Cross multiply
    135,440.64x = 186,910.71 × 81,048.74
  4. Step 4: Simplify right side
    135,440.64x = 15,148,876,299.52
  5. Step 5: Solve for x
    x = 15,148,876,299.52/135,440.64
  6. Step 6: Final answer
    x = 111,848.82

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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.