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Finding the Fourth Proportional to 61,405.38, 92,111.31 and 19,855.62

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Solution

The fourth proportional to 61,405.38, 92,111.31 and 19,855.62 is: 29,784.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,405.38 : 92,111.31 = 19,855.62 : x
  2. Step 2: Convert to fraction form
    61,405.38/92,111.31 = 19,855.62/x
  3. Step 3: Cross multiply
    61,405.38x = 92,111.31 × 19,855.62
  4. Step 4: Simplify right side
    61,405.38x = 1,828,927,169.06
  5. Step 5: Solve for x
    x = 1,828,927,169.06/61,405.38
  6. Step 6: Final answer
    x = 29,784.48

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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.