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Finding the Fourth Proportional to 91,858.90, 126,764.18 and 51,571.66

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Solution

The fourth proportional to 91,858.90, 126,764.18 and 51,571.66 is: 71,168.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,858.90 : 126,764.18 = 51,571.66 : x
  2. Step 2: Convert to fraction form
    91,858.90/126,764.18 = 51,571.66/x
  3. Step 3: Cross multiply
    91,858.90x = 126,764.18 × 51,571.66
  4. Step 4: Simplify right side
    91,858.90x = 6,537,439,191.14
  5. Step 5: Solve for x
    x = 6,537,439,191.14/91,858.90
  6. Step 6: Final answer
    x = 71,168.27

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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.