Home / 81,986.85-122,984.69-25,831.35

Finding the Fourth Proportional to 81,986.85, 122,984.69 and 25,831.35

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Solution

The fourth proportional to 81,986.85, 122,984.69 and 25,831.35 is: 38,748.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,986.85 : 122,984.69 = 25,831.35 : x
  2. Step 2: Convert to fraction form
    81,986.85/122,984.69 = 25,831.35/x
  3. Step 3: Cross multiply
    81,986.85x = 122,984.69 × 25,831.35
  4. Step 4: Simplify right side
    81,986.85x = 3,176,860,442.87
  5. Step 5: Solve for x
    x = 3,176,860,442.87/81,986.85
  6. Step 6: Final answer
    x = 38,748.41

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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.