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Finding the Fourth Proportional to 61,091.87, 91,652.14 and 18,969.77

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Solution

The fourth proportional to 61,091.87, 91,652.14 and 18,969.77 is: 28,459.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,091.87 : 91,652.14 = 18,969.77 : x
  2. Step 2: Convert to fraction form
    61,091.87/91,652.14 = 18,969.77/x
  3. Step 3: Cross multiply
    61,091.87x = 91,652.14 × 18,969.77
  4. Step 4: Simplify right side
    61,091.87x = 1,738,620,268.65
  5. Step 5: Solve for x
    x = 1,738,620,268.65/61,091.87
  6. Step 6: Final answer
    x = 28,459.11

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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.