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Finding the Fourth Proportional to 81,004.65, 121,492.96 and 36,621.09

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Solution

The fourth proportional to 81,004.65, 121,492.96 and 36,621.09 is: 54,925.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004.65 : 121,492.96 = 36,621.09 : x
  2. Step 2: Convert to fraction form
    81,004.65/121,492.96 = 36,621.09/x
  3. Step 3: Cross multiply
    81,004.65x = 121,492.96 × 36,621.09
  4. Step 4: Simplify right side
    81,004.65x = 4,449,204,622.53
  5. Step 5: Solve for x
    x = 4,449,204,622.53/81,004.65
  6. Step 6: Final answer
    x = 54,925.30

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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.