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Finding the Fourth Proportional to 66,799.80, 100,199.70 and 61,356.60

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Solution

The fourth proportional to 66,799.80, 100,199.70 and 61,356.60 is: 92,034.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,799.80 : 100,199.70 = 61,356.60 : x
  2. Step 2: Convert to fraction form
    66,799.80/100,199.70 = 61,356.60/x
  3. Step 3: Cross multiply
    66,799.80x = 100,199.70 × 61,356.60
  4. Step 4: Simplify right side
    66,799.80x = 6,147,912,913.02
  5. Step 5: Solve for x
    x = 6,147,912,913.02/66,799.80
  6. Step 6: Final answer
    x = 92,034.90

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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.