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Finding the Fourth Proportional to 129,889.20, 194,979.60 and 100,437.60

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Solution

The fourth proportional to 129,889.20, 194,979.60 and 100,437.60 is: 150,769.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,889.20 : 194,979.60 = 100,437.60 : x
  2. Step 2: Convert to fraction form
    129,889.20/194,979.60 = 100,437.60/x
  3. Step 3: Cross multiply
    129,889.20x = 194,979.60 × 100,437.60
  4. Step 4: Simplify right side
    129,889.20x = 19,583,283,072.96
  5. Step 5: Solve for x
    x = 19,583,283,072.96/129,889.20
  6. Step 6: Final answer
    x = 150,769.14

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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.