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Finding the Fourth Proportional to 55,107.45, 75,975.84 and 39,781.08

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Solution

The fourth proportional to 55,107.45, 75,975.84 and 39,781.08 is: 54,845.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,107.45 : 75,975.84 = 39,781.08 : x
  2. Step 2: Convert to fraction form
    55,107.45/75,975.84 = 39,781.08/x
  3. Step 3: Cross multiply
    55,107.45x = 75,975.84 × 39,781.08
  4. Step 4: Simplify right side
    55,107.45x = 3,022,400,969.11
  5. Step 5: Solve for x
    x = 3,022,400,969.11/55,107.45
  6. Step 6: Final answer
    x = 54,845.60

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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.