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Finding the Fourth Proportional to 75,813.16, 104,629.56 and 56,659.60

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Solution

The fourth proportional to 75,813.16, 104,629.56 and 56,659.60 is: 78,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,813.16 : 104,629.56 = 56,659.60 : x
  2. Step 2: Convert to fraction form
    75,813.16/104,629.56 = 56,659.60/x
  3. Step 3: Cross multiply
    75,813.16x = 104,629.56 × 56,659.60
  4. Step 4: Simplify right side
    75,813.16x = 5,928,269,017.78
  5. Step 5: Solve for x
    x = 5,928,269,017.78/75,813.16
  6. Step 6: Final answer
    x = 78,195.78

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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.