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Finding the Fourth Proportional to 66,635.40, 99,970.41 and 19,888.26

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Solution

The fourth proportional to 66,635.40, 99,970.41 and 19,888.26 is: 29,837.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,635.40 : 99,970.41 = 19,888.26 : x
  2. Step 2: Convert to fraction form
    66,635.40/99,970.41 = 19,888.26/x
  3. Step 3: Cross multiply
    66,635.40x = 99,970.41 × 19,888.26
  4. Step 4: Simplify right side
    66,635.40x = 1,988,237,506.39
  5. Step 5: Solve for x
    x = 1,988,237,506.39/66,635.40
  6. Step 6: Final answer
    x = 29,837.56

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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.