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Finding the Fourth Proportional to 91,672.70, 126,517.29 and 51,386.54

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Solution

The fourth proportional to 91,672.70, 126,517.29 and 51,386.54 is: 70,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,672.70 : 126,517.29 = 51,386.54 : x
  2. Step 2: Convert to fraction form
    91,672.70/126,517.29 = 51,386.54/x
  3. Step 3: Cross multiply
    91,672.70x = 126,517.29 × 51,386.54
  4. Step 4: Simplify right side
    91,672.70x = 6,501,285,783.28
  5. Step 5: Solve for x
    x = 6,501,285,783.28/91,672.70
  6. Step 6: Final answer
    x = 70,918.45

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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.