Home / 128,604.63-177,561.06-80,280.15

Finding the Fourth Proportional to 128,604.63, 177,561.06 and 80,280.15

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Solution

The fourth proportional to 128,604.63, 177,561.06 and 80,280.15 is: 110,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,604.63 : 177,561.06 = 80,280.15 : x
  2. Step 2: Convert to fraction form
    128,604.63/177,561.06 = 80,280.15/x
  3. Step 3: Cross multiply
    128,604.63x = 177,561.06 × 80,280.15
  4. Step 4: Simplify right side
    128,604.63x = 14,254,628,530.96
  5. Step 5: Solve for x
    x = 14,254,628,530.96/128,604.63
  6. Step 6: Final answer
    x = 110,840.71

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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.