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Finding the Fourth Proportional to 103,661.57, 155,484.97 and 40,469.86

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Solution

The fourth proportional to 103,661.57, 155,484.97 and 40,469.86 is: 60,701.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.57 : 155,484.97 = 40,469.86 : x
  2. Step 2: Convert to fraction form
    103,661.57/155,484.97 = 40,469.86/x
  3. Step 3: Cross multiply
    103,661.57x = 155,484.97 × 40,469.86
  4. Step 4: Simplify right side
    103,661.57x = 6,292,455,061.19
  5. Step 5: Solve for x
    x = 6,292,455,061.19/103,661.57
  6. Step 6: Final answer
    x = 60,701.91

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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.