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Finding the Fourth Proportional to 72,636.83, 108,961.51 and 20,046.32

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Solution

The fourth proportional to 72,636.83, 108,961.51 and 20,046.32 is: 30,071.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,636.83 : 108,961.51 = 20,046.32 : x
  2. Step 2: Convert to fraction form
    72,636.83/108,961.51 = 20,046.32/x
  3. Step 3: Cross multiply
    72,636.83x = 108,961.51 × 20,046.32
  4. Step 4: Simplify right side
    72,636.83x = 2,184,277,186.00
  5. Step 5: Solve for x
    x = 2,184,277,186.00/72,636.83
  6. Step 6: Final answer
    x = 30,071.21

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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.