Home / 318,485.57-477,728.38-81,828.26

Finding the Fourth Proportional to 318,485.57, 477,728.38 and 81,828.26

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Solution

The fourth proportional to 318,485.57, 477,728.38 and 81,828.26 is: 122,742.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,485.57 : 477,728.38 = 81,828.26 : x
  2. Step 2: Convert to fraction form
    318,485.57/477,728.38 = 81,828.26/x
  3. Step 3: Cross multiply
    318,485.57x = 477,728.38 × 81,828.26
  4. Step 4: Simplify right side
    318,485.57x = 39,091,679,699.38
  5. Step 5: Solve for x
    x = 39,091,679,699.38/318,485.57
  6. Step 6: Final answer
    x = 122,742.39

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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.