Home / 105,311.44-157,991.86-72,047.16

Finding the Fourth Proportional to 105,311.44, 157,991.86 and 72,047.16

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Solution

The fourth proportional to 105,311.44, 157,991.86 and 72,047.16 is: 108,087.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,311.44 : 157,991.86 = 72,047.16 : x
  2. Step 2: Convert to fraction form
    105,311.44/157,991.86 = 72,047.16/x
  3. Step 3: Cross multiply
    105,311.44x = 157,991.86 × 72,047.16
  4. Step 4: Simplify right side
    105,311.44x = 11,382,864,816.12
  5. Step 5: Solve for x
    x = 11,382,864,816.12/105,311.44
  6. Step 6: Final answer
    x = 108,087.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.