Home / 81,636.36-122,431.32-31,705.80

Finding the Fourth Proportional to 81,636.36, 122,431.32 and 31,705.80

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Solution

The fourth proportional to 81,636.36, 122,431.32 and 31,705.80 is: 47,549.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,636.36 : 122,431.32 = 31,705.80 : x
  2. Step 2: Convert to fraction form
    81,636.36/122,431.32 = 31,705.80/x
  3. Step 3: Cross multiply
    81,636.36x = 122,431.32 × 31,705.80
  4. Step 4: Simplify right side
    81,636.36x = 3,881,782,945.66
  5. Step 5: Solve for x
    x = 3,881,782,945.66/81,636.36
  6. Step 6: Final answer
    x = 47,549.68

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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.