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Finding the Fourth Proportional to 65,976, 91,171.12 and 50,030.88

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Solution

The fourth proportional to 65,976, 91,171.12 and 50,030.88 is: 69,136.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,976 : 91,171.12 = 50,030.88 : x
  2. Step 2: Convert to fraction form
    65,976/91,171.12 = 50,030.88/x
  3. Step 3: Cross multiply
    65,976x = 91,171.12 × 50,030.88
  4. Step 4: Simplify right side
    65,976x = 4,561,371,364.19
  5. Step 5: Solve for x
    x = 4,561,371,364.19/65,976
  6. Step 6: Final answer
    x = 69,136.83

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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.