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Finding the Fourth Proportional to 103,421.55, 155,132.33 and 33,300.86

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Solution

The fourth proportional to 103,421.55, 155,132.33 and 33,300.86 is: 49,951.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,421.55 : 155,132.33 = 33,300.86 : x
  2. Step 2: Convert to fraction form
    103,421.55/155,132.33 = 33,300.86/x
  3. Step 3: Cross multiply
    103,421.55x = 155,132.33 × 33,300.86
  4. Step 4: Simplify right side
    103,421.55x = 5,166,040,224.13
  5. Step 5: Solve for x
    x = 5,166,040,224.13/103,421.55
  6. Step 6: Final answer
    x = 49,951.29

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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.