Home / 128,480.82-177,291.06-74,772.96

Finding the Fourth Proportional to 128,480.82, 177,291.06 and 74,772.96

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Solution

The fourth proportional to 128,480.82, 177,291.06 and 74,772.96 is: 103,179.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,480.82 : 177,291.06 = 74,772.96 : x
  2. Step 2: Convert to fraction form
    128,480.82/177,291.06 = 74,772.96/x
  3. Step 3: Cross multiply
    128,480.82x = 177,291.06 × 74,772.96
  4. Step 4: Simplify right side
    128,480.82x = 13,256,577,337.74
  5. Step 5: Solve for x
    x = 13,256,577,337.74/128,480.82
  6. Step 6: Final answer
    x = 103,179.43

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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.