Home / 128,515.64-177,371.17-80,125.42

Finding the Fourth Proportional to 128,515.64, 177,371.17 and 80,125.42

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Solution

The fourth proportional to 128,515.64, 177,371.17 and 80,125.42 is: 110,585.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,515.64 : 177,371.17 = 80,125.42 : x
  2. Step 2: Convert to fraction form
    128,515.64/177,371.17 = 80,125.42/x
  3. Step 3: Cross multiply
    128,515.64x = 177,371.17 × 80,125.42
  4. Step 4: Simplify right side
    128,515.64x = 14,211,938,432.69
  5. Step 5: Solve for x
    x = 14,211,938,432.69/128,515.64
  6. Step 6: Final answer
    x = 110,585.28

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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.