Home / 81,401.96-122,181.75-39,311.60

Finding the Fourth Proportional to 81,401.96, 122,181.75 and 39,311.60

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Solution

The fourth proportional to 81,401.96, 122,181.75 and 39,311.60 is: 59,005.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,401.96 : 122,181.75 = 39,311.60 : x
  2. Step 2: Convert to fraction form
    81,401.96/122,181.75 = 39,311.60/x
  3. Step 3: Cross multiply
    81,401.96x = 122,181.75 × 39,311.60
  4. Step 4: Simplify right side
    81,401.96x = 4,803,159,472.39
  5. Step 5: Solve for x
    x = 4,803,159,472.39/81,401.96
  6. Step 6: Final answer
    x = 59,005.45

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1.5x scale

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.