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Finding the Fourth Proportional to 86,907.96, 120,002.74 and 69,857.56

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Solution

The fourth proportional to 86,907.96, 120,002.74 and 69,857.56 is: 96,459.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.96 : 120,002.74 = 69,857.56 : x
  2. Step 2: Convert to fraction form
    86,907.96/120,002.74 = 69,857.56/x
  3. Step 3: Cross multiply
    86,907.96x = 120,002.74 × 69,857.56
  4. Step 4: Simplify right side
    86,907.96x = 8,383,099,119.06
  5. Step 5: Solve for x
    x = 8,383,099,119.06/86,907.96
  6. Step 6: Final answer
    x = 96,459.51

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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.