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Finding the Fourth Proportional to 81,020.90, 121,567.80 and 36,624.80

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Solution

The fourth proportional to 81,020.90, 121,567.80 and 36,624.80 is: 54,953.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,020.90 : 121,567.80 = 36,624.80 : x
  2. Step 2: Convert to fraction form
    81,020.90/121,567.80 = 36,624.80/x
  3. Step 3: Cross multiply
    81,020.90x = 121,567.80 × 36,624.80
  4. Step 4: Simplify right side
    81,020.90x = 4,452,396,361.44
  5. Step 5: Solve for x
    x = 4,452,396,361.44/81,020.90
  6. Step 6: Final answer
    x = 54,953.68

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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.