Home / 81,505.10-122,243.64-21,534.22

Finding the Fourth Proportional to 81,505.10, 122,243.64 and 21,534.22

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Solution

The fourth proportional to 81,505.10, 122,243.64 and 21,534.22 is: 32,297.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,505.10 : 122,243.64 = 21,534.22 : x
  2. Step 2: Convert to fraction form
    81,505.10/122,243.64 = 21,534.22/x
  3. Step 3: Cross multiply
    81,505.10x = 122,243.64 × 21,534.22
  4. Step 4: Simplify right side
    81,505.10x = 2,632,421,437.36
  5. Step 5: Solve for x
    x = 2,632,421,437.36/81,505.10
  6. Step 6: Final answer
    x = 32,297.63

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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.