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Finding the Fourth Proportional to 81,622.90, 122,460.81 and 40,040.74

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Solution

The fourth proportional to 81,622.90, 122,460.81 and 40,040.74 is: 60,074.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,622.90 : 122,460.81 = 40,040.74 : x
  2. Step 2: Convert to fraction form
    81,622.90/122,460.81 = 40,040.74/x
  3. Step 3: Cross multiply
    81,622.90x = 122,460.81 × 40,040.74
  4. Step 4: Simplify right side
    81,622.90x = 4,903,420,640.89
  5. Step 5: Solve for x
    x = 4,903,420,640.89/81,622.90
  6. Step 6: Final answer
    x = 60,074.08

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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.