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Finding the Fourth Proportional to 91,959.05, 126,900.65 and 51,671.81

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Solution

The fourth proportional to 91,959.05, 126,900.65 and 51,671.81 is: 71,305.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,959.05 : 126,900.65 = 51,671.81 : x
  2. Step 2: Convert to fraction form
    91,959.05/126,900.65 = 51,671.81/x
  3. Step 3: Cross multiply
    91,959.05x = 126,900.65 × 51,671.81
  4. Step 4: Simplify right side
    91,959.05x = 6,557,185,382.81
  5. Step 5: Solve for x
    x = 6,557,185,382.81/91,959.05
  6. Step 6: Final answer
    x = 71,305.50

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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.