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Finding the Fourth Proportional to 225,504.93, 311,119.54 and 128,639.19

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Solution

The fourth proportional to 225,504.93, 311,119.54 and 128,639.19 is: 177,478.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,504.93 : 311,119.54 = 128,639.19 : x
  2. Step 2: Convert to fraction form
    225,504.93/311,119.54 = 128,639.19/x
  3. Step 3: Cross multiply
    225,504.93x = 311,119.54 × 128,639.19
  4. Step 4: Simplify right side
    225,504.93x = 40,022,165,618.77
  5. Step 5: Solve for x
    x = 40,022,165,618.77/225,504.93
  6. Step 6: Final answer
    x = 177,478.01

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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.