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Finding the Fourth Proportional to 55,081, 82,621.30 and 15,638.12

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Solution

The fourth proportional to 55,081, 82,621.30 and 15,638.12 is: 23,457.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,081 : 82,621.30 = 15,638.12 : x
  2. Step 2: Convert to fraction form
    55,081/82,621.30 = 15,638.12/x
  3. Step 3: Cross multiply
    55,081x = 82,621.30 × 15,638.12
  4. Step 4: Simplify right side
    55,081x = 1,292,041,558.31
  5. Step 5: Solve for x
    x = 1,292,041,558.31/55,081
  6. Step 6: Final answer
    x = 23,457.12

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.