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Finding the Fourth Proportional to 72,644.66, 108,973.26 and 20,054.15

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Solution

The fourth proportional to 72,644.66, 108,973.26 and 20,054.15 is: 30,082.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,644.66 : 108,973.26 = 20,054.15 : x
  2. Step 2: Convert to fraction form
    72,644.66/108,973.26 = 20,054.15/x
  3. Step 3: Cross multiply
    72,644.66x = 108,973.26 × 20,054.15
  4. Step 4: Simplify right side
    72,644.66x = 2,185,366,102.03
  5. Step 5: Solve for x
    x = 2,185,366,102.03/72,644.66
  6. Step 6: Final answer
    x = 30,082.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.