Home / 128,515.42-177,330.19-80,734.94

Finding the Fourth Proportional to 128,515.42, 177,330.19 and 80,734.94

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Solution

The fourth proportional to 128,515.42, 177,330.19 and 80,734.94 is: 111,400.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,515.42 : 177,330.19 = 80,734.94 : x
  2. Step 2: Convert to fraction form
    128,515.42/177,330.19 = 80,734.94/x
  3. Step 3: Cross multiply
    128,515.42x = 177,330.19 × 80,734.94
  4. Step 4: Simplify right side
    128,515.42x = 14,316,742,249.84
  5. Step 5: Solve for x
    x = 14,316,742,249.84/128,515.42
  6. Step 6: Final answer
    x = 111,400.97

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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.