Home / 128,531.40-193,257.90-108,256.20

Finding the Fourth Proportional to 128,531.40, 193,257.90 and 108,256.20

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Solution

The fourth proportional to 128,531.40, 193,257.90 and 108,256.20 is: 162,772.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.40 : 193,257.90 = 108,256.20 : x
  2. Step 2: Convert to fraction form
    128,531.40/193,257.90 = 108,256.20/x
  3. Step 3: Cross multiply
    128,531.40x = 193,257.90 × 108,256.20
  4. Step 4: Simplify right side
    128,531.40x = 20,921,365,873.98
  5. Step 5: Solve for x
    x = 20,921,365,873.98/128,531.40
  6. Step 6: Final answer
    x = 162,772.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.