Home / 81,039.36-111,784.74-53,816.70

Finding the Fourth Proportional to 81,039.36, 111,784.74 and 53,816.70

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Solution

The fourth proportional to 81,039.36, 111,784.74 and 53,816.70 is: 74,234.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,039.36 : 111,784.74 = 53,816.70 : x
  2. Step 2: Convert to fraction form
    81,039.36/111,784.74 = 53,816.70/x
  3. Step 3: Cross multiply
    81,039.36x = 111,784.74 × 53,816.70
  4. Step 4: Simplify right side
    81,039.36x = 6,015,885,817.16
  5. Step 5: Solve for x
    x = 6,015,885,817.16/81,039.36
  6. Step 6: Final answer
    x = 74,234.12

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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.