Home / 128,514.42-177,328.81-80,733.94

Finding the Fourth Proportional to 128,514.42, 177,328.81 and 80,733.94

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Solution

The fourth proportional to 128,514.42, 177,328.81 and 80,733.94 is: 111,399.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.42 : 177,328.81 = 80,733.94 : x
  2. Step 2: Convert to fraction form
    128,514.42/177,328.81 = 80,733.94/x
  3. Step 3: Cross multiply
    128,514.42x = 177,328.81 × 80,733.94
  4. Step 4: Simplify right side
    128,514.42x = 14,316,453,506.81
  5. Step 5: Solve for x
    x = 14,316,453,506.81/128,514.42
  6. Step 6: Final answer
    x = 111,399.59

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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.