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Finding the Fourth Proportional to 103,772.56, 155,658.95 and 28,892.86

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Solution

The fourth proportional to 103,772.56, 155,658.95 and 28,892.86 is: 43,339.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,772.56 : 155,658.95 = 28,892.86 : x
  2. Step 2: Convert to fraction form
    103,772.56/155,658.95 = 28,892.86/x
  3. Step 3: Cross multiply
    103,772.56x = 155,658.95 × 28,892.86
  4. Step 4: Simplify right side
    103,772.56x = 4,497,432,250.10
  5. Step 5: Solve for x
    x = 4,497,432,250.10/103,772.56
  6. Step 6: Final answer
    x = 43,339.32

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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.