Home / 128,811.87-177,770.70-71,456.85

Finding the Fourth Proportional to 128,811.87, 177,770.70 and 71,456.85

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Solution

The fourth proportional to 128,811.87, 177,770.70 and 71,456.85 is: 98,616.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,811.87 : 177,770.70 = 71,456.85 : x
  2. Step 2: Convert to fraction form
    128,811.87/177,770.70 = 71,456.85/x
  3. Step 3: Cross multiply
    128,811.87x = 177,770.70 × 71,456.85
  4. Step 4: Simplify right side
    128,811.87x = 12,702,934,244.30
  5. Step 5: Solve for x
    x = 12,702,934,244.30/128,811.87
  6. Step 6: Final answer
    x = 98,616.18

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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.