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Finding the Fourth Proportional to 115,928.71, 160,800.09 and 112,855.97

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Solution

The fourth proportional to 115,928.71, 160,800.09 and 112,855.97 is: 156,538.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,928.71 : 160,800.09 = 112,855.97 : x
  2. Step 2: Convert to fraction form
    115,928.71/160,800.09 = 112,855.97/x
  3. Step 3: Cross multiply
    115,928.71x = 160,800.09 × 112,855.97
  4. Step 4: Simplify right side
    115,928.71x = 18,147,250,133.04
  5. Step 5: Solve for x
    x = 18,147,250,133.04/115,928.71
  6. Step 6: Final answer
    x = 156,538.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.