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Finding the Fourth Proportional to 53,890.60, 80,835.90 and 53,015.80

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Solution

The fourth proportional to 53,890.60, 80,835.90 and 53,015.80 is: 79,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,890.60 : 80,835.90 = 53,015.80 : x
  2. Step 2: Convert to fraction form
    53,890.60/80,835.90 = 53,015.80/x
  3. Step 3: Cross multiply
    53,890.60x = 80,835.90 × 53,015.80
  4. Step 4: Simplify right side
    53,890.60x = 4,285,579,907.22
  5. Step 5: Solve for x
    x = 4,285,579,907.22/53,890.60
  6. Step 6: Final answer
    x = 79,523.70

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1.5x scale

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.