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Finding the Fourth Proportional to 321,680.70, 482,638.05 and 111,339.90

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Solution

The fourth proportional to 321,680.70, 482,638.05 and 111,339.90 is: 167,050.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,680.70 : 482,638.05 = 111,339.90 : x
  2. Step 2: Convert to fraction form
    321,680.70/482,638.05 = 111,339.90/x
  3. Step 3: Cross multiply
    321,680.70x = 482,638.05 × 111,339.90
  4. Step 4: Simplify right side
    321,680.70x = 53,736,872,223.20
  5. Step 5: Solve for x
    x = 53,736,872,223.20/321,680.70
  6. Step 6: Final answer
    x = 167,050.35

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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.