Home / 128,769.55-177,739.01-77,774.18

Finding the Fourth Proportional to 128,769.55, 177,739.01 and 77,774.18

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Solution

The fourth proportional to 128,769.55, 177,739.01 and 77,774.18 is: 107,350.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,769.55 : 177,739.01 = 77,774.18 : x
  2. Step 2: Convert to fraction form
    128,769.55/177,739.01 = 77,774.18/x
  3. Step 3: Cross multiply
    128,769.55x = 177,739.01 × 77,774.18
  4. Step 4: Simplify right side
    128,769.55x = 13,823,504,770.85
  5. Step 5: Solve for x
    x = 13,823,504,770.85/128,769.55
  6. Step 6: Final answer
    x = 107,350.73

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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.