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Finding the Fourth Proportional to 66,556.32, 99,849.84 and 19,808.16

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Solution

The fourth proportional to 66,556.32, 99,849.84 and 19,808.16 is: 29,716.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,556.32 : 99,849.84 = 19,808.16 : x
  2. Step 2: Convert to fraction form
    66,556.32/99,849.84 = 19,808.16/x
  3. Step 3: Cross multiply
    66,556.32x = 99,849.84 × 19,808.16
  4. Step 4: Simplify right side
    66,556.32x = 1,977,841,606.69
  5. Step 5: Solve for x
    x = 1,977,841,606.69/66,556.32
  6. Step 6: Final answer
    x = 29,716.81

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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.