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Finding the Fourth Proportional to 72,968.60, 109,452.90 and 41,778.20

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Solution

The fourth proportional to 72,968.60, 109,452.90 and 41,778.20 is: 62,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,968.60 : 109,452.90 = 41,778.20 : x
  2. Step 2: Convert to fraction form
    72,968.60/109,452.90 = 41,778.20/x
  3. Step 3: Cross multiply
    72,968.60x = 109,452.90 × 41,778.20
  4. Step 4: Simplify right side
    72,968.60x = 4,572,745,146.78
  5. Step 5: Solve for x
    x = 4,572,745,146.78/72,968.60
  6. Step 6: Final answer
    x = 62,667.30

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1.5x scale

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.