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Finding the Fourth Proportional to 43,658.40, 65,660.40 and 39,165.60

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Solution

The fourth proportional to 43,658.40, 65,660.40 and 39,165.60 is: 58,903.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,658.40 : 65,660.40 = 39,165.60 : x
  2. Step 2: Convert to fraction form
    43,658.40/65,660.40 = 39,165.60/x
  3. Step 3: Cross multiply
    43,658.40x = 65,660.40 × 39,165.60
  4. Step 4: Simplify right side
    43,658.40x = 2,571,628,962.24
  5. Step 5: Solve for x
    x = 2,571,628,962.24/43,658.40
  6. Step 6: Final answer
    x = 58,903.42

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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.