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Finding the Fourth Proportional to 112,381.01, 155,049.80 and 80,120.87

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Solution

The fourth proportional to 112,381.01, 155,049.80 and 80,120.87 is: 110,541.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,381.01 : 155,049.80 = 80,120.87 : x
  2. Step 2: Convert to fraction form
    112,381.01/155,049.80 = 80,120.87/x
  3. Step 3: Cross multiply
    112,381.01x = 155,049.80 × 80,120.87
  4. Step 4: Simplify right side
    112,381.01x = 12,422,724,869.33
  5. Step 5: Solve for x
    x = 12,422,724,869.33/112,381.01
  6. Step 6: Final answer
    x = 110,541.14

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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.