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Finding the Fourth Proportional to 72,709.00, 109,065.93 and 20,114.08

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Solution

The fourth proportional to 72,709.00, 109,065.93 and 20,114.08 is: 30,171.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,709.00 : 109,065.93 = 20,114.08 : x
  2. Step 2: Convert to fraction form
    72,709.00/109,065.93 = 20,114.08/x
  3. Step 3: Cross multiply
    72,709.00x = 109,065.93 × 20,114.08
  4. Step 4: Simplify right side
    72,709.00x = 2,193,760,412.46
  5. Step 5: Solve for x
    x = 2,193,760,412.46/72,709.00
  6. Step 6: Final answer
    x = 30,171.79

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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.