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Finding the Fourth Proportional to 103,771.40, 155,705.70 and 53,907.80

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Solution

The fourth proportional to 103,771.40, 155,705.70 and 53,907.80 is: 80,886.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,771.40 : 155,705.70 = 53,907.80 : x
  2. Step 2: Convert to fraction form
    103,771.40/155,705.70 = 53,907.80/x
  3. Step 3: Cross multiply
    103,771.40x = 155,705.70 × 53,907.80
  4. Step 4: Simplify right side
    103,771.40x = 8,393,751,734.46
  5. Step 5: Solve for x
    x = 8,393,751,734.46/103,771.40
  6. Step 6: Final answer
    x = 80,886.95

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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.