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Finding the Fourth Proportional to 48,280.78, 66,633.60 and 28,138.60

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Solution

The fourth proportional to 48,280.78, 66,633.60 and 28,138.60 is: 38,834.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,280.78 : 66,633.60 = 28,138.60 : x
  2. Step 2: Convert to fraction form
    48,280.78/66,633.60 = 28,138.60/x
  3. Step 3: Cross multiply
    48,280.78x = 66,633.60 × 28,138.60
  4. Step 4: Simplify right side
    48,280.78x = 1,874,976,216.96
  5. Step 5: Solve for x
    x = 1,874,976,216.96/48,280.78
  6. Step 6: Final answer
    x = 38,834.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.