Home / 128,504.62-177,429.93-103,150.46

Finding the Fourth Proportional to 128,504.62, 177,429.93 and 103,150.46

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Solution

The fourth proportional to 128,504.62, 177,429.93 and 103,150.46 is: 142,422.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,504.62 : 177,429.93 = 103,150.46 : x
  2. Step 2: Convert to fraction form
    128,504.62/177,429.93 = 103,150.46/x
  3. Step 3: Cross multiply
    128,504.62x = 177,429.93 × 103,150.46
  4. Step 4: Simplify right side
    128,504.62x = 18,301,978,954.03
  5. Step 5: Solve for x
    x = 18,301,978,954.03/128,504.62
  6. Step 6: Final answer
    x = 142,422.73

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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.