Home / 81,121.64-111,936.73-45,307.08

Finding the Fourth Proportional to 81,121.64, 111,936.73 and 45,307.08

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Solution

The fourth proportional to 81,121.64, 111,936.73 and 45,307.08 is: 62,517.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.64 : 111,936.73 = 45,307.08 : x
  2. Step 2: Convert to fraction form
    81,121.64/111,936.73 = 45,307.08/x
  3. Step 3: Cross multiply
    81,121.64x = 111,936.73 × 45,307.08
  4. Step 4: Simplify right side
    81,121.64x = 5,071,526,381.05
  5. Step 5: Solve for x
    x = 5,071,526,381.05/81,121.64
  6. Step 6: Final answer
    x = 62,517.55

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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.