Home / 128,520.57-177,353.60-71,158.76

Finding the Fourth Proportional to 128,520.57, 177,353.60 and 71,158.76

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Solution

The fourth proportional to 128,520.57, 177,353.60 and 71,158.76 is: 98,196.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,520.57 : 177,353.60 = 71,158.76 : x
  2. Step 2: Convert to fraction form
    128,520.57/177,353.60 = 71,158.76/x
  3. Step 3: Cross multiply
    128,520.57x = 177,353.60 × 71,158.76
  4. Step 4: Simplify right side
    128,520.57x = 12,620,262,257.54
  5. Step 5: Solve for x
    x = 12,620,262,257.54/128,520.57
  6. Step 6: Final answer
    x = 98,196.44

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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.