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Finding the Fourth Proportional to 66,989.34, 100,390.18 and 50,338.74

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Solution

The fourth proportional to 66,989.34, 100,390.18 and 50,338.74 is: 75,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,989.34 : 100,390.18 = 50,338.74 : x
  2. Step 2: Convert to fraction form
    66,989.34/100,390.18 = 50,338.74/x
  3. Step 3: Cross multiply
    66,989.34x = 100,390.18 × 50,338.74
  4. Step 4: Simplify right side
    66,989.34x = 5,053,515,169.57
  5. Step 5: Solve for x
    x = 5,053,515,169.57/66,989.34
  6. Step 6: Final answer
    x = 75,437.60

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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.