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Finding the Fourth Proportional to 154,012.97, 212,531.68 and 86,028.86

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Solution

The fourth proportional to 154,012.97, 212,531.68 and 86,028.86 is: 118,716.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,012.97 : 212,531.68 = 86,028.86 : x
  2. Step 2: Convert to fraction form
    154,012.97/212,531.68 = 86,028.86/x
  3. Step 3: Cross multiply
    154,012.97x = 212,531.68 × 86,028.86
  4. Step 4: Simplify right side
    154,012.97x = 18,283,858,783.15
  5. Step 5: Solve for x
    x = 18,283,858,783.15/154,012.97
  6. Step 6: Final answer
    x = 118,716.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.