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Finding the Fourth Proportional to 43,710.60, 65,565.90 and 43,321.80

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Solution

The fourth proportional to 43,710.60, 65,565.90 and 43,321.80 is: 64,982.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,710.60 : 65,565.90 = 43,321.80 : x
  2. Step 2: Convert to fraction form
    43,710.60/65,565.90 = 43,321.80/x
  3. Step 3: Cross multiply
    43,710.60x = 65,565.90 × 43,321.80
  4. Step 4: Simplify right side
    43,710.60x = 2,840,432,806.62
  5. Step 5: Solve for x
    x = 2,840,432,806.62/43,710.60
  6. Step 6: Final answer
    x = 64,982.70

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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.