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Finding the Fourth Proportional to 61,890.41, 92,820.67 and 28,578.44

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Solution

The fourth proportional to 61,890.41, 92,820.67 and 28,578.44 is: 42,860.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,890.41 : 92,820.67 = 28,578.44 : x
  2. Step 2: Convert to fraction form
    61,890.41/92,820.67 = 28,578.44/x
  3. Step 3: Cross multiply
    61,890.41x = 92,820.67 × 28,578.44
  4. Step 4: Simplify right side
    61,890.41x = 2,652,670,108.96
  5. Step 5: Solve for x
    x = 2,652,670,108.96/61,890.41
  6. Step 6: Final answer
    x = 42,860.76

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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.