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Finding the Fourth Proportional to 81,099.82, 111,916.63 and 47,127.50

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Solution

The fourth proportional to 81,099.82, 111,916.63 and 47,127.50 is: 65,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,099.82 : 111,916.63 = 47,127.50 : x
  2. Step 2: Convert to fraction form
    81,099.82/111,916.63 = 47,127.50/x
  3. Step 3: Cross multiply
    81,099.82x = 111,916.63 × 47,127.50
  4. Step 4: Simplify right side
    81,099.82x = 5,274,351,142.30
  5. Step 5: Solve for x
    x = 5,274,351,142.30/81,099.82
  6. Step 6: Final answer
    x = 65,035.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.