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Finding the Fourth Proportional to 66,223.60, 99,337.80 and 19,481.20

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Solution

The fourth proportional to 66,223.60, 99,337.80 and 19,481.20 is: 29,222.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,223.60 : 99,337.80 = 19,481.20 : x
  2. Step 2: Convert to fraction form
    66,223.60/99,337.80 = 19,481.20/x
  3. Step 3: Cross multiply
    66,223.60x = 99,337.80 × 19,481.20
  4. Step 4: Simplify right side
    66,223.60x = 1,935,219,549.36
  5. Step 5: Solve for x
    x = 1,935,219,549.36/66,223.60
  6. Step 6: Final answer
    x = 29,222.51

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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.