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Finding the Fourth Proportional to 81,485.29, 112,449.94 and 45,189.29

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Solution

The fourth proportional to 81,485.29, 112,449.94 and 45,189.29 is: 62,361.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,485.29 : 112,449.94 = 45,189.29 : x
  2. Step 2: Convert to fraction form
    81,485.29/112,449.94 = 45,189.29/x
  3. Step 3: Cross multiply
    81,485.29x = 112,449.94 × 45,189.29
  4. Step 4: Simplify right side
    81,485.29x = 5,081,532,949.14
  5. Step 5: Solve for x
    x = 5,081,532,949.14/81,485.29
  6. Step 6: Final answer
    x = 62,361.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.