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Finding the Fourth Proportional to 78,813.44, 108,720.24 and 53,286.20

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Solution

The fourth proportional to 78,813.44, 108,720.24 and 53,286.20 is: 73,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.44 : 108,720.24 = 53,286.20 : x
  2. Step 2: Convert to fraction form
    78,813.44/108,720.24 = 53,286.20/x
  3. Step 3: Cross multiply
    78,813.44x = 108,720.24 × 53,286.20
  4. Step 4: Simplify right side
    78,813.44x = 5,793,288,452.69
  5. Step 5: Solve for x
    x = 5,793,288,452.69/78,813.44
  6. Step 6: Final answer
    x = 73,506.35

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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.