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Finding the Fourth Proportional to 72,990, 109,492.02 and 33,558.12

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Solution

The fourth proportional to 72,990, 109,492.02 and 33,558.12 is: 50,340.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990 : 109,492.02 = 33,558.12 : x
  2. Step 2: Convert to fraction form
    72,990/109,492.02 = 33,558.12/x
  3. Step 3: Cross multiply
    72,990x = 109,492.02 × 33,558.12
  4. Step 4: Simplify right side
    72,990x = 3,674,346,346.20
  5. Step 5: Solve for x
    x = 3,674,346,346.20/72,990
  6. Step 6: Final answer
    x = 50,340.41

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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.