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Finding the Fourth Proportional to 91,970.69, 126,921.80 and 51,682.03

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Solution

The fourth proportional to 91,970.69, 126,921.80 and 51,682.03 is: 71,322.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,970.69 : 126,921.80 = 51,682.03 : x
  2. Step 2: Convert to fraction form
    91,970.69/126,921.80 = 51,682.03/x
  3. Step 3: Cross multiply
    91,970.69x = 126,921.80 × 51,682.03
  4. Step 4: Simplify right side
    91,970.69x = 6,559,576,087.15
  5. Step 5: Solve for x
    x = 6,559,576,087.15/91,970.69
  6. Step 6: Final answer
    x = 71,322.47

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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.