Home / 81,427.18-122,152.20-25,271.86

Finding the Fourth Proportional to 81,427.18, 122,152.20 and 25,271.86

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Solution

The fourth proportional to 81,427.18, 122,152.20 and 25,271.86 is: 37,911.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,427.18 : 122,152.20 = 25,271.86 : x
  2. Step 2: Convert to fraction form
    81,427.18/122,152.20 = 25,271.86/x
  3. Step 3: Cross multiply
    81,427.18x = 122,152.20 × 25,271.86
  4. Step 4: Simplify right side
    81,427.18x = 3,087,013,297.09
  5. Step 5: Solve for x
    x = 3,087,013,297.09/81,427.18
  6. Step 6: Final answer
    x = 37,911.34

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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.