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Finding the Fourth Proportional to 91,964, 126,909.21 and 51,684.59

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Solution

The fourth proportional to 91,964, 126,909.21 and 51,684.59 is: 71,324.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,964 : 126,909.21 = 51,684.59 : x
  2. Step 2: Convert to fraction form
    91,964/126,909.21 = 51,684.59/x
  3. Step 3: Cross multiply
    91,964x = 126,909.21 × 51,684.59
  4. Step 4: Simplify right side
    91,964x = 6,559,250,486.07
  5. Step 5: Solve for x
    x = 6,559,250,486.07/91,964
  6. Step 6: Final answer
    x = 71,324.11

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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.