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Finding the Fourth Proportional to 103,420.80, 155,131.20 and 92,923.20

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Solution

The fourth proportional to 103,420.80, 155,131.20 and 92,923.20 is: 139,384.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,420.80 : 155,131.20 = 92,923.20 : x
  2. Step 2: Convert to fraction form
    103,420.80/155,131.20 = 92,923.20/x
  3. Step 3: Cross multiply
    103,420.80x = 155,131.20 × 92,923.20
  4. Step 4: Simplify right side
    103,420.80x = 14,415,287,523.84
  5. Step 5: Solve for x
    x = 14,415,287,523.84/103,420.80
  6. Step 6: Final answer
    x = 139,384.80

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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.