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Finding the Fourth Proportional to 66,372.86, 99,556.38 and 21,393.22

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Solution

The fourth proportional to 66,372.86, 99,556.38 and 21,393.22 is: 32,088.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,372.86 : 99,556.38 = 21,393.22 : x
  2. Step 2: Convert to fraction form
    66,372.86/99,556.38 = 21,393.22/x
  3. Step 3: Cross multiply
    66,372.86x = 99,556.38 × 21,393.22
  4. Step 4: Simplify right side
    66,372.86x = 2,129,831,539.74
  5. Step 5: Solve for x
    x = 2,129,831,539.74/66,372.86
  6. Step 6: Final answer
    x = 32,088.89

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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.