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Finding the Fourth Proportional to 65,771.80, 98,544.30 and 30,639.40

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Solution

The fourth proportional to 65,771.80, 98,544.30 and 30,639.40 is: 45,906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,771.80 : 98,544.30 = 30,639.40 : x
  2. Step 2: Convert to fraction form
    65,771.80/98,544.30 = 30,639.40/x
  3. Step 3: Cross multiply
    65,771.80x = 98,544.30 × 30,639.40
  4. Step 4: Simplify right side
    65,771.80x = 3,019,338,225.42
  5. Step 5: Solve for x
    x = 3,019,338,225.42/65,771.80
  6. Step 6: Final answer
    x = 45,906.27

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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.