Home / 212,855.28-319,007.08-86,348.26

Finding the Fourth Proportional to 212,855.28, 319,007.08 and 86,348.26

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Solution

The fourth proportional to 212,855.28, 319,007.08 and 86,348.26 is: 129,410.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,855.28 : 319,007.08 = 86,348.26 : x
  2. Step 2: Convert to fraction form
    212,855.28/319,007.08 = 86,348.26/x
  3. Step 3: Cross multiply
    212,855.28x = 319,007.08 × 86,348.26
  4. Step 4: Simplify right side
    212,855.28x = 27,545,706,285.68
  5. Step 5: Solve for x
    x = 27,545,706,285.68/212,855.28
  6. Step 6: Final answer
    x = 129,410.49

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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.