Home / 318,486.07-477,729.13-81,828.75

Finding the Fourth Proportional to 318,486.07, 477,729.13 and 81,828.75

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Solution

The fourth proportional to 318,486.07, 477,729.13 and 81,828.75 is: 122,743.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,486.07 : 477,729.13 = 81,828.75 : x
  2. Step 2: Convert to fraction form
    318,486.07/477,729.13 = 81,828.75/x
  3. Step 3: Cross multiply
    318,486.07x = 477,729.13 × 81,828.75
  4. Step 4: Simplify right side
    318,486.07x = 39,091,977,546.49
  5. Step 5: Solve for x
    x = 39,091,977,546.49/318,486.07
  6. Step 6: Final answer
    x = 122,743.13

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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.