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Finding the Fourth Proportional to 74,672.20, 112,008.30 and 72,922.60

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Solution

The fourth proportional to 74,672.20, 112,008.30 and 72,922.60 is: 109,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,672.20 : 112,008.30 = 72,922.60 : x
  2. Step 2: Convert to fraction form
    74,672.20/112,008.30 = 72,922.60/x
  3. Step 3: Cross multiply
    74,672.20x = 112,008.30 × 72,922.60
  4. Step 4: Simplify right side
    74,672.20x = 8,167,936,457.58
  5. Step 5: Solve for x
    x = 8,167,936,457.58/74,672.20
  6. Step 6: Final answer
    x = 109,383.90

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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.