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Finding the Fourth Proportional to 112,660.68, 155,479.26 and 64,917.12

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Solution

The fourth proportional to 112,660.68, 155,479.26 and 64,917.12 is: 89,589.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,660.68 : 155,479.26 = 64,917.12 : x
  2. Step 2: Convert to fraction form
    112,660.68/155,479.26 = 64,917.12/x
  3. Step 3: Cross multiply
    112,660.68x = 155,479.26 × 64,917.12
  4. Step 4: Simplify right side
    112,660.68x = 10,093,265,778.93
  5. Step 5: Solve for x
    x = 10,093,265,778.93/112,660.68
  6. Step 6: Final answer
    x = 89,589.96

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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.