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Finding the Fourth Proportional to 72,578, 108,867.08 and 28,802

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Solution

The fourth proportional to 72,578, 108,867.08 and 28,802 is: 43,203.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578 : 108,867.08 = 28,802 : x
  2. Step 2: Convert to fraction form
    72,578/108,867.08 = 28,802/x
  3. Step 3: Cross multiply
    72,578x = 108,867.08 × 28,802
  4. Step 4: Simplify right side
    72,578x = 3,135,589,638.16
  5. Step 5: Solve for x
    x = 3,135,589,638.16/72,578
  6. Step 6: Final answer
    x = 43,203.03

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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.