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Finding the Fourth Proportional to 81,907.70, 113,005.34 and 66,774.27

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Solution

The fourth proportional to 81,907.70, 113,005.34 and 66,774.27 is: 92,126.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,907.70 : 113,005.34 = 66,774.27 : x
  2. Step 2: Convert to fraction form
    81,907.70/113,005.34 = 66,774.27/x
  3. Step 3: Cross multiply
    81,907.70x = 113,005.34 × 66,774.27
  4. Step 4: Simplify right side
    81,907.70x = 7,545,848,519.58
  5. Step 5: Solve for x
    x = 7,545,848,519.58/81,907.70
  6. Step 6: Final answer
    x = 92,126.25

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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.