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Finding the Fourth Proportional to 45,914.80, 68,740.80 and 28,265.80

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Solution

The fourth proportional to 45,914.80, 68,740.80 and 28,265.80 is: 42,317.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,914.80 : 68,740.80 = 28,265.80 : x
  2. Step 2: Convert to fraction form
    45,914.80/68,740.80 = 28,265.80/x
  3. Step 3: Cross multiply
    45,914.80x = 68,740.80 × 28,265.80
  4. Step 4: Simplify right side
    45,914.80x = 1,943,013,704.64
  5. Step 5: Solve for x
    x = 1,943,013,704.64/45,914.80
  6. Step 6: Final answer
    x = 42,317.81

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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.