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Finding the Fourth Proportional to 212,843.42, 319,341.46 and 91,212.92

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Solution

The fourth proportional to 212,843.42, 319,341.46 and 91,212.92 is: 136,852.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,843.42 : 319,341.46 = 91,212.92 : x
  2. Step 2: Convert to fraction form
    212,843.42/319,341.46 = 91,212.92/x
  3. Step 3: Cross multiply
    212,843.42x = 319,341.46 × 91,212.92
  4. Step 4: Simplify right side
    212,843.42x = 29,128,067,043.66
  5. Step 5: Solve for x
    x = 29,128,067,043.66/212,843.42
  6. Step 6: Final answer
    x = 136,852.09

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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.