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Finding the Fourth Proportional to 213,271, 319,905.58 and 86,883.05

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Solution

The fourth proportional to 213,271, 319,905.58 and 86,883.05 is: 130,324.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,271 : 319,905.58 = 86,883.05 : x
  2. Step 2: Convert to fraction form
    213,271/319,905.58 = 86,883.05/x
  3. Step 3: Cross multiply
    213,271x = 319,905.58 × 86,883.05
  4. Step 4: Simplify right side
    213,271x = 27,794,372,502.42
  5. Step 5: Solve for x
    x = 27,794,372,502.42/213,271
  6. Step 6: Final answer
    x = 130,324.20

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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.