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Finding the Fourth Proportional to 311,939.30, 468,018.30 and 112,266.20

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Solution

The fourth proportional to 311,939.30, 468,018.30 and 112,266.20 is: 168,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,939.30 : 468,018.30 = 112,266.20 : x
  2. Step 2: Convert to fraction form
    311,939.30/468,018.30 = 112,266.20/x
  3. Step 3: Cross multiply
    311,939.30x = 468,018.30 × 112,266.20
  4. Step 4: Simplify right side
    311,939.30x = 52,542,636,071.46
  5. Step 5: Solve for x
    x = 52,542,636,071.46/311,939.30
  6. Step 6: Final answer
    x = 168,438.65

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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.