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Finding the Fourth Proportional to 91,967.82, 126,921.42 and 51,136.53

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Solution

The fourth proportional to 91,967.82, 126,921.42 and 51,136.53 is: 70,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,967.82 : 126,921.42 = 51,136.53 : x
  2. Step 2: Convert to fraction form
    91,967.82/126,921.42 = 51,136.53/x
  3. Step 3: Cross multiply
    91,967.82x = 126,921.42 × 51,136.53
  4. Step 4: Simplify right side
    91,967.82x = 6,490,321,001.47
  5. Step 5: Solve for x
    x = 6,490,321,001.47/91,967.82
  6. Step 6: Final answer
    x = 70,571.65

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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.