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Finding the Fourth Proportional to 61,890.50, 92,820.81 and 28,578.54

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Solution

The fourth proportional to 61,890.50, 92,820.81 and 28,578.54 is: 42,860.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,890.50 : 92,820.81 = 28,578.54 : x
  2. Step 2: Convert to fraction form
    61,890.50/92,820.81 = 28,578.54/x
  3. Step 3: Cross multiply
    61,890.50x = 92,820.81 × 28,578.54
  4. Step 4: Simplify right side
    61,890.50x = 2,652,683,231.42
  5. Step 5: Solve for x
    x = 2,652,683,231.42/61,890.50
  6. Step 6: Final answer
    x = 42,860.91

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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.