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Finding the Fourth Proportional to 213,999.88, 320,999.07 and 64,239.56

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Solution

The fourth proportional to 213,999.88, 320,999.07 and 64,239.56 is: 96,359.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,999.88 : 320,999.07 = 64,239.56 : x
  2. Step 2: Convert to fraction form
    213,999.88/320,999.07 = 64,239.56/x
  3. Step 3: Cross multiply
    213,999.88x = 320,999.07 × 64,239.56
  4. Step 4: Simplify right side
    213,999.88x = 20,620,839,017.21
  5. Step 5: Solve for x
    x = 20,620,839,017.21/213,999.88
  6. Step 6: Final answer
    x = 96,359.12

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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.