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Finding the Fourth Proportional to 60,771.80, 91,211.70 and 35,780.60

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Solution

The fourth proportional to 60,771.80, 91,211.70 and 35,780.60 is: 53,702.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,771.80 : 91,211.70 = 35,780.60 : x
  2. Step 2: Convert to fraction form
    60,771.80/91,211.70 = 35,780.60/x
  3. Step 3: Cross multiply
    60,771.80x = 91,211.70 × 35,780.60
  4. Step 4: Simplify right side
    60,771.80x = 3,263,609,353.02
  5. Step 5: Solve for x
    x = 3,263,609,353.02/60,771.80
  6. Step 6: Final answer
    x = 53,702.69

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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.