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Finding the Fourth Proportional to 73,179.45, 109,769.18 and 28,781.93

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Solution

The fourth proportional to 73,179.45, 109,769.18 and 28,781.93 is: 43,172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,179.45 : 109,769.18 = 28,781.93 : x
  2. Step 2: Convert to fraction form
    73,179.45/109,769.18 = 28,781.93/x
  3. Step 3: Cross multiply
    73,179.45x = 109,769.18 × 28,781.93
  4. Step 4: Simplify right side
    73,179.45x = 3,159,368,985.43
  5. Step 5: Solve for x
    x = 3,159,368,985.43/73,179.45
  6. Step 6: Final answer
    x = 43,172.90

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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.