Home / 128,942.12-177,944.64-75,218.60

Finding the Fourth Proportional to 128,942.12, 177,944.64 and 75,218.60

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Solution

The fourth proportional to 128,942.12, 177,944.64 and 75,218.60 is: 103,804.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,942.12 : 177,944.64 = 75,218.60 : x
  2. Step 2: Convert to fraction form
    128,942.12/177,944.64 = 75,218.60/x
  3. Step 3: Cross multiply
    128,942.12x = 177,944.64 × 75,218.60
  4. Step 4: Simplify right side
    128,942.12x = 13,384,746,698.30
  5. Step 5: Solve for x
    x = 13,384,746,698.30/128,942.12
  6. Step 6: Final answer
    x = 103,804.30

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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.