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Finding the Fourth Proportional to 43,689.60, 65,404.80 and 38,505.60

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Solution

The fourth proportional to 43,689.60, 65,404.80 and 38,505.60 is: 57,644.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,689.60 : 65,404.80 = 38,505.60 : x
  2. Step 2: Convert to fraction form
    43,689.60/65,404.80 = 38,505.60/x
  3. Step 3: Cross multiply
    43,689.60x = 65,404.80 × 38,505.60
  4. Step 4: Simplify right side
    43,689.60x = 2,518,451,066.88
  5. Step 5: Solve for x
    x = 2,518,451,066.88/43,689.60
  6. Step 6: Final answer
    x = 57,644.18

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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.