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Finding the Fourth Proportional to 126,892.61, 175,342.74 and 120,743.49

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Solution

The fourth proportional to 126,892.61, 175,342.74 and 120,743.49 is: 166,845.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,892.61 : 175,342.74 = 120,743.49 : x
  2. Step 2: Convert to fraction form
    126,892.61/175,342.74 = 120,743.49/x
  3. Step 3: Cross multiply
    126,892.61x = 175,342.74 × 120,743.49
  4. Step 4: Simplify right side
    126,892.61x = 21,171,494,373.76
  5. Step 5: Solve for x
    x = 21,171,494,373.76/126,892.61
  6. Step 6: Final answer
    x = 166,845.77

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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.