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Finding the Fourth Proportional to 72,723.30, 108,998.55 and 30,603.30

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Solution

The fourth proportional to 72,723.30, 108,998.55 and 30,603.30 is: 45,868.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,723.30 : 108,998.55 = 30,603.30 : x
  2. Step 2: Convert to fraction form
    72,723.30/108,998.55 = 30,603.30/x
  3. Step 3: Cross multiply
    72,723.30x = 108,998.55 × 30,603.30
  4. Step 4: Simplify right side
    72,723.30x = 3,335,715,325.22
  5. Step 5: Solve for x
    x = 3,335,715,325.22/72,723.30
  6. Step 6: Final answer
    x = 45,868.59

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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.