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Finding the Fourth Proportional to 321,937.20, 482,970.60 and 111,531.60

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Solution

The fourth proportional to 321,937.20, 482,970.60 and 111,531.60 is: 167,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,937.20 : 482,970.60 = 111,531.60 : x
  2. Step 2: Convert to fraction form
    321,937.20/482,970.60 = 111,531.60/x
  3. Step 3: Cross multiply
    321,937.20x = 482,970.60 × 111,531.60
  4. Step 4: Simplify right side
    321,937.20x = 53,866,483,770.96
  5. Step 5: Solve for x
    x = 53,866,483,770.96/321,937.20
  6. Step 6: Final answer
    x = 167,319.85

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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.