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Finding the Fourth Proportional to 61,343.72, 92,015.52 and 19,790.72

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Solution

The fourth proportional to 61,343.72, 92,015.52 and 19,790.72 is: 29,686.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,343.72 : 92,015.52 = 19,790.72 : x
  2. Step 2: Convert to fraction form
    61,343.72/92,015.52 = 19,790.72/x
  3. Step 3: Cross multiply
    61,343.72x = 92,015.52 × 19,790.72
  4. Step 4: Simplify right side
    61,343.72x = 1,821,053,391.97
  5. Step 5: Solve for x
    x = 1,821,053,391.97/61,343.72
  6. Step 6: Final answer
    x = 29,686.06

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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.