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Finding the Fourth Proportional to 66,458.40, 99,601.20 and 47,968.80

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Solution

The fourth proportional to 66,458.40, 99,601.20 and 47,968.80 is: 71,890.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.40 : 99,601.20 = 47,968.80 : x
  2. Step 2: Convert to fraction form
    66,458.40/99,601.20 = 47,968.80/x
  3. Step 3: Cross multiply
    66,458.40x = 99,601.20 × 47,968.80
  4. Step 4: Simplify right side
    66,458.40x = 4,777,750,042.56
  5. Step 5: Solve for x
    x = 4,777,750,042.56/66,458.40
  6. Step 6: Final answer
    x = 71,890.84

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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.