Home / 211,859.12-317,788.40-54,087.60

Finding the Fourth Proportional to 211,859.12, 317,788.40 and 54,087.60

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Solution

The fourth proportional to 211,859.12, 317,788.40 and 54,087.60 is: 81,131.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,859.12 : 317,788.40 = 54,087.60 : x
  2. Step 2: Convert to fraction form
    211,859.12/317,788.40 = 54,087.60/x
  3. Step 3: Cross multiply
    211,859.12x = 317,788.40 × 54,087.60
  4. Step 4: Simplify right side
    211,859.12x = 17,188,411,863.84
  5. Step 5: Solve for x
    x = 17,188,411,863.84/211,859.12
  6. Step 6: Final answer
    x = 81,131.33

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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.