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Finding the Fourth Proportional to 45,907.80, 68,730.30 and 28,258.80

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Solution

The fourth proportional to 45,907.80, 68,730.30 and 28,258.80 is: 42,307.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,907.80 : 68,730.30 = 28,258.80 : x
  2. Step 2: Convert to fraction form
    45,907.80/68,730.30 = 28,258.80/x
  3. Step 3: Cross multiply
    45,907.80x = 68,730.30 × 28,258.80
  4. Step 4: Simplify right side
    45,907.80x = 1,942,235,801.64
  5. Step 5: Solve for x
    x = 1,942,235,801.64/45,907.80
  6. Step 6: Final answer
    x = 42,307.32

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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.