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Finding the Fourth Proportional to 112,912.68, 155,808.28 and 65,181.40

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Solution

The fourth proportional to 112,912.68, 155,808.28 and 65,181.40 is: 89,943.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,912.68 : 155,808.28 = 65,181.40 : x
  2. Step 2: Convert to fraction form
    112,912.68/155,808.28 = 65,181.40/x
  3. Step 3: Cross multiply
    112,912.68x = 155,808.28 × 65,181.40
  4. Step 4: Simplify right side
    112,912.68x = 10,155,801,821.99
  5. Step 5: Solve for x
    x = 10,155,801,821.99/112,912.68
  6. Step 6: Final answer
    x = 89,943.86

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