Home / 128,519.67-177,423.72-80,135.94

Finding the Fourth Proportional to 128,519.67, 177,423.72 and 80,135.94

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Solution

The fourth proportional to 128,519.67, 177,423.72 and 80,135.94 is: 110,629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,519.67 : 177,423.72 = 80,135.94 : x
  2. Step 2: Convert to fraction form
    128,519.67/177,423.72 = 80,135.94/x
  3. Step 3: Cross multiply
    128,519.67x = 177,423.72 × 80,135.94
  4. Step 4: Simplify right side
    128,519.67x = 14,218,016,580.50
  5. Step 5: Solve for x
    x = 14,218,016,580.50/128,519.67
  6. Step 6: Final answer
    x = 110,629.11

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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.