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Finding the Fourth Proportional to 43,687.80, 65,531.70 and 42,958.80

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Solution

The fourth proportional to 43,687.80, 65,531.70 and 42,958.80 is: 64,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,687.80 : 65,531.70 = 42,958.80 : x
  2. Step 2: Convert to fraction form
    43,687.80/65,531.70 = 42,958.80/x
  3. Step 3: Cross multiply
    43,687.80x = 65,531.70 × 42,958.80
  4. Step 4: Simplify right side
    43,687.80x = 2,815,163,193.96
  5. Step 5: Solve for x
    x = 2,815,163,193.96/43,687.80
  6. Step 6: Final answer
    x = 64,438.20

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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.