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Finding the Fourth Proportional to 61,438.26, 92,172 and 19,885.26

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Solution

The fourth proportional to 61,438.26, 92,172 and 19,885.26 is: 29,832.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,438.26 : 92,172 = 19,885.26 : x
  2. Step 2: Convert to fraction form
    61,438.26/92,172 = 19,885.26/x
  3. Step 3: Cross multiply
    61,438.26x = 92,172 × 19,885.26
  4. Step 4: Simplify right side
    61,438.26x = 1,832,864,184.72
  5. Step 5: Solve for x
    x = 1,832,864,184.72/61,438.26
  6. Step 6: Final answer
    x = 29,832.62

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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.