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Finding the Fourth Proportional to 215,996.51, 323,999.42 and 66,233.48

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Solution

The fourth proportional to 215,996.51, 323,999.42 and 66,233.48 is: 99,351.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,996.51 : 323,999.42 = 66,233.48 : x
  2. Step 2: Convert to fraction form
    215,996.51/323,999.42 = 66,233.48/x
  3. Step 3: Cross multiply
    215,996.51x = 323,999.42 × 66,233.48
  4. Step 4: Simplify right side
    215,996.51x = 21,459,607,153.42
  5. Step 5: Solve for x
    x = 21,459,607,153.42/215,996.51
  6. Step 6: Final answer
    x = 99,351.64

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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.