Home / 81,408.70-122,113.05-71,567.20

Finding the Fourth Proportional to 81,408.70, 122,113.05 and 71,567.20

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Solution

The fourth proportional to 81,408.70, 122,113.05 and 71,567.20 is: 107,350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,408.70 : 122,113.05 = 71,567.20 : x
  2. Step 2: Convert to fraction form
    81,408.70/122,113.05 = 71,567.20/x
  3. Step 3: Cross multiply
    81,408.70x = 122,113.05 × 71,567.20
  4. Step 4: Simplify right side
    81,408.70x = 8,739,289,071.96
  5. Step 5: Solve for x
    x = 8,739,289,071.96/81,408.70
  6. Step 6: Final answer
    x = 107,350.80

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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.