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Finding the Fourth Proportional to 112,912.68, 155,808.27 and 65,181.41

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Solution

The fourth proportional to 112,912.68, 155,808.27 and 65,181.41 is: 89,943.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,912.68 : 155,808.27 = 65,181.41 : x
  2. Step 2: Convert to fraction form
    112,912.68/155,808.27 = 65,181.41/x
  3. Step 3: Cross multiply
    112,912.68x = 155,808.27 × 65,181.41
  4. Step 4: Simplify right side
    112,912.68x = 10,155,802,728.26
  5. Step 5: Solve for x
    x = 10,155,802,728.26/112,912.68
  6. Step 6: Final answer
    x = 89,943.86

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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.