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Finding the Fourth Proportional to 45,907.68, 68,700 and 28,132.80

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Solution

The fourth proportional to 45,907.68, 68,700 and 28,132.80 is: 42,100.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,907.68 : 68,700 = 28,132.80 : x
  2. Step 2: Convert to fraction form
    45,907.68/68,700 = 28,132.80/x
  3. Step 3: Cross multiply
    45,907.68x = 68,700 × 28,132.80
  4. Step 4: Simplify right side
    45,907.68x = 1,932,723,360
  5. Step 5: Solve for x
    x = 1,932,723,360/45,907.68
  6. Step 6: Final answer
    x = 42,100.22

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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.