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Finding the Fourth Proportional to 66,394.42, 99,611.07 and 19,648.51

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Solution

The fourth proportional to 66,394.42, 99,611.07 and 19,648.51 is: 29,478.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,394.42 : 99,611.07 = 19,648.51 : x
  2. Step 2: Convert to fraction form
    66,394.42/99,611.07 = 19,648.51/x
  3. Step 3: Cross multiply
    66,394.42x = 99,611.07 × 19,648.51
  4. Step 4: Simplify right side
    66,394.42x = 1,957,209,105.01
  5. Step 5: Solve for x
    x = 1,957,209,105.01/66,394.42
  6. Step 6: Final answer
    x = 29,478.52

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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.