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Finding the Fourth Proportional to 103,936.80, 155,674.80 and 80,487.20

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Solution

The fourth proportional to 103,936.80, 155,674.80 and 80,487.20 is: 120,552.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,936.80 : 155,674.80 = 80,487.20 : x
  2. Step 2: Convert to fraction form
    103,936.80/155,674.80 = 80,487.20/x
  3. Step 3: Cross multiply
    103,936.80x = 155,674.80 × 80,487.20
  4. Step 4: Simplify right side
    103,936.80x = 12,529,828,762.56
  5. Step 5: Solve for x
    x = 12,529,828,762.56/103,936.80
  6. Step 6: Final answer
    x = 120,552.38

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1.5x scale

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.