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Finding the Fourth Proportional to 47,272.60, 70,815.30 and 30,644.20

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Solution

The fourth proportional to 47,272.60, 70,815.30 and 30,644.20 is: 45,905.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,272.60 : 70,815.30 = 30,644.20 : x
  2. Step 2: Convert to fraction form
    47,272.60/70,815.30 = 30,644.20/x
  3. Step 3: Cross multiply
    47,272.60x = 70,815.30 × 30,644.20
  4. Step 4: Simplify right side
    47,272.60x = 2,170,078,216.26
  5. Step 5: Solve for x
    x = 2,170,078,216.26/47,272.60
  6. Step 6: Final answer
    x = 45,905.62

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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.