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Finding the Fourth Proportional to 66,481.20, 99,721.80 and 44,222.40

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Solution

The fourth proportional to 66,481.20, 99,721.80 and 44,222.40 is: 66,333.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,481.20 : 99,721.80 = 44,222.40 : x
  2. Step 2: Convert to fraction form
    66,481.20/99,721.80 = 44,222.40/x
  3. Step 3: Cross multiply
    66,481.20x = 99,721.80 × 44,222.40
  4. Step 4: Simplify right side
    66,481.20x = 4,409,937,328.32
  5. Step 5: Solve for x
    x = 4,409,937,328.32/66,481.20
  6. Step 6: Final answer
    x = 66,333.60

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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.