Home / 212,971.85-319,579.88-86,588.76

Finding the Fourth Proportional to 212,971.85, 319,579.88 and 86,588.76

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Solution

The fourth proportional to 212,971.85, 319,579.88 and 86,588.76 is: 129,932.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,971.85 : 319,579.88 = 86,588.76 : x
  2. Step 2: Convert to fraction form
    212,971.85/319,579.88 = 86,588.76/x
  3. Step 3: Cross multiply
    212,971.85x = 319,579.88 × 86,588.76
  4. Step 4: Simplify right side
    212,971.85x = 27,672,025,097.21
  5. Step 5: Solve for x
    x = 27,672,025,097.21/212,971.85
  6. Step 6: Final answer
    x = 129,932.79

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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.