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Finding the Fourth Proportional to 225,426.80, 311,013.46 and 129,931.45

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Solution

The fourth proportional to 225,426.80, 311,013.46 and 129,931.45 is: 179,261.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,426.80 : 311,013.46 = 129,931.45 : x
  2. Step 2: Convert to fraction form
    225,426.80/311,013.46 = 129,931.45/x
  3. Step 3: Cross multiply
    225,426.80x = 311,013.46 × 129,931.45
  4. Step 4: Simplify right side
    225,426.80x = 40,410,429,827.32
  5. Step 5: Solve for x
    x = 40,410,429,827.32/225,426.80
  6. Step 6: Final answer
    x = 179,261.87

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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.