Home / 128,495.28-177,390.60-80,111.82

Finding the Fourth Proportional to 128,495.28, 177,390.60 and 80,111.82

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Solution

The fourth proportional to 128,495.28, 177,390.60 and 80,111.82 is: 110,596.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,495.28 : 177,390.60 = 80,111.82 : x
  2. Step 2: Convert to fraction form
    128,495.28/177,390.60 = 80,111.82/x
  3. Step 3: Cross multiply
    128,495.28x = 177,390.60 × 80,111.82
  4. Step 4: Simplify right side
    128,495.28x = 14,211,083,816.89
  5. Step 5: Solve for x
    x = 14,211,083,816.89/128,495.28
  6. Step 6: Final answer
    x = 110,596.15

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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.