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Finding the Fourth Proportional to 225,708.04, 311,499.37 and 128,926.36

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Solution

The fourth proportional to 225,708.04, 311,499.37 and 128,926.36 is: 177,931.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,708.04 : 311,499.37 = 128,926.36 : x
  2. Step 2: Convert to fraction form
    225,708.04/311,499.37 = 128,926.36/x
  3. Step 3: Cross multiply
    225,708.04x = 311,499.37 × 128,926.36
  4. Step 4: Simplify right side
    225,708.04x = 40,160,478,358.90
  5. Step 5: Solve for x
    x = 40,160,478,358.90/225,708.04
  6. Step 6: Final answer
    x = 177,931.09

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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.