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Finding the Fourth Proportional to 39,876.80, 59,815.20 and 27,435.20

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Solution

The fourth proportional to 39,876.80, 59,815.20 and 27,435.20 is: 41,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,876.80 : 59,815.20 = 27,435.20 : x
  2. Step 2: Convert to fraction form
    39,876.80/59,815.20 = 27,435.20/x
  3. Step 3: Cross multiply
    39,876.80x = 59,815.20 × 27,435.20
  4. Step 4: Simplify right side
    39,876.80x = 1,641,041,975.04
  5. Step 5: Solve for x
    x = 1,641,041,975.04/39,876.80
  6. Step 6: Final answer
    x = 41,152.80

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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.