Home / 212,875.85-319,313.77-86,584.80

Finding the Fourth Proportional to 212,875.85, 319,313.77 and 86,584.80

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Solution

The fourth proportional to 212,875.85, 319,313.77 and 86,584.80 is: 129,877.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,875.85 : 319,313.77 = 86,584.80 : x
  2. Step 2: Convert to fraction form
    212,875.85/319,313.77 = 86,584.80/x
  3. Step 3: Cross multiply
    212,875.85x = 319,313.77 × 86,584.80
  4. Step 4: Simplify right side
    212,875.85x = 27,647,716,883.20
  5. Step 5: Solve for x
    x = 27,647,716,883.20/212,875.85
  6. Step 6: Final answer
    x = 129,877.19

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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.