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Finding the Fourth Proportional to 225,483.68, 311,090.22 and 128,617.94

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Solution

The fourth proportional to 225,483.68, 311,090.22 and 128,617.94 is: 177,448.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,483.68 : 311,090.22 = 128,617.94 : x
  2. Step 2: Convert to fraction form
    225,483.68/311,090.22 = 128,617.94/x
  3. Step 3: Cross multiply
    225,483.68x = 311,090.22 × 128,617.94
  4. Step 4: Simplify right side
    225,483.68x = 40,011,784,028.27
  5. Step 5: Solve for x
    x = 40,011,784,028.27/225,483.68
  6. Step 6: Final answer
    x = 177,448.69

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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.