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Finding the Fourth Proportional to 81,450.75, 112,405.08 and 45,639.44

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Solution

The fourth proportional to 81,450.75, 112,405.08 and 45,639.44 is: 62,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.75 : 112,405.08 = 45,639.44 : x
  2. Step 2: Convert to fraction form
    81,450.75/112,405.08 = 45,639.44/x
  3. Step 3: Cross multiply
    81,450.75x = 112,405.08 × 45,639.44
  4. Step 4: Simplify right side
    81,450.75x = 5,130,104,904.36
  5. Step 5: Solve for x
    x = 5,130,104,904.36/81,450.75
  6. Step 6: Final answer
    x = 62,984.13

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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.