Home / 81,121.62-111,936.76-45,307.06

Finding the Fourth Proportional to 81,121.62, 111,936.76 and 45,307.06

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Solution

The fourth proportional to 81,121.62, 111,936.76 and 45,307.06 is: 62,517.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.62 : 111,936.76 = 45,307.06 : x
  2. Step 2: Convert to fraction form
    81,121.62/111,936.76 = 45,307.06/x
  3. Step 3: Cross multiply
    81,121.62x = 111,936.76 × 45,307.06
  4. Step 4: Simplify right side
    81,121.62x = 5,071,525,501.53
  5. Step 5: Solve for x
    x = 5,071,525,501.53/81,121.62
  6. Step 6: Final answer
    x = 62,517.56

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1.5x scale

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.