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Finding the Fourth Proportional to 81,160.71, 111,999.61 and 45,351.01

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Solution

The fourth proportional to 81,160.71, 111,999.61 and 45,351.01 is: 62,583.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.71 : 111,999.61 = 45,351.01 : x
  2. Step 2: Convert to fraction form
    81,160.71/111,999.61 = 45,351.01/x
  3. Step 3: Cross multiply
    81,160.71x = 111,999.61 × 45,351.01
  4. Step 4: Simplify right side
    81,160.71x = 5,079,295,433.11
  5. Step 5: Solve for x
    x = 5,079,295,433.11/81,160.71
  6. Step 6: Final answer
    x = 62,583.18

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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.