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Finding the Fourth Proportional to 73,131.72, 109,483.68 and 66,127.80

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Solution

The fourth proportional to 73,131.72, 109,483.68 and 66,127.80 is: 98,998.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,131.72 : 109,483.68 = 66,127.80 : x
  2. Step 2: Convert to fraction form
    73,131.72/109,483.68 = 66,127.80/x
  3. Step 3: Cross multiply
    73,131.72x = 109,483.68 × 66,127.80
  4. Step 4: Simplify right side
    73,131.72x = 7,239,914,894.30
  5. Step 5: Solve for x
    x = 7,239,914,894.30/73,131.72
  6. Step 6: Final answer
    x = 98,998.29

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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.