Home / 81,284.94-111,923.94-71,156.70

Finding the Fourth Proportional to 81,284.94, 111,923.94 and 71,156.70

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Solution

The fourth proportional to 81,284.94, 111,923.94 and 71,156.70 is: 97,978.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,284.94 : 111,923.94 = 71,156.70 : x
  2. Step 2: Convert to fraction form
    81,284.94/111,923.94 = 71,156.70/x
  3. Step 3: Cross multiply
    81,284.94x = 111,923.94 × 71,156.70
  4. Step 4: Simplify right side
    81,284.94x = 7,964,138,221.40
  5. Step 5: Solve for x
    x = 7,964,138,221.40/81,284.94
  6. Step 6: Final answer
    x = 97,978.03

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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.