Home / 80,762.21-121,143.81-28,171.75

Finding the Fourth Proportional to 80,762.21, 121,143.81 and 28,171.75

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Solution

The fourth proportional to 80,762.21, 121,143.81 and 28,171.75 is: 42,257.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762.21 : 121,143.81 = 28,171.75 : x
  2. Step 2: Convert to fraction form
    80,762.21/121,143.81 = 28,171.75/x
  3. Step 3: Cross multiply
    80,762.21x = 121,143.81 × 28,171.75
  4. Step 4: Simplify right side
    80,762.21x = 3,412,833,129.37
  5. Step 5: Solve for x
    x = 3,412,833,129.37/80,762.21
  6. Step 6: Final answer
    x = 42,257.80

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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.