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Finding the Fourth Proportional to 300,129.70, 450,195.32 and 122,636.72

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Solution

The fourth proportional to 300,129.70, 450,195.32 and 122,636.72 is: 183,955.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,129.70 : 450,195.32 = 122,636.72 : x
  2. Step 2: Convert to fraction form
    300,129.70/450,195.32 = 122,636.72/x
  3. Step 3: Cross multiply
    300,129.70x = 450,195.32 × 122,636.72
  4. Step 4: Simplify right side
    300,129.70x = 55,210,474,693.29
  5. Step 5: Solve for x
    x = 55,210,474,693.29/300,129.70
  6. Step 6: Final answer
    x = 183,955.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.