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Finding the Fourth Proportional to 130,018.70, 194,874.45 and 55,138.70

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Solution

The fourth proportional to 130,018.70, 194,874.45 and 55,138.70 is: 82,642.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,018.70 : 194,874.45 = 55,138.70 : x
  2. Step 2: Convert to fraction form
    130,018.70/194,874.45 = 55,138.70/x
  3. Step 3: Cross multiply
    130,018.70x = 194,874.45 × 55,138.70
  4. Step 4: Simplify right side
    130,018.70x = 10,745,123,836.22
  5. Step 5: Solve for x
    x = 10,745,123,836.22/130,018.70
  6. Step 6: Final answer
    x = 82,642.91

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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.