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Finding the Fourth Proportional to 139,661.75, 209,493.03 and 50,915.12

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Solution

The fourth proportional to 139,661.75, 209,493.03 and 50,915.12 is: 76,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,661.75 : 209,493.03 = 50,915.12 : x
  2. Step 2: Convert to fraction form
    139,661.75/209,493.03 = 50,915.12/x
  3. Step 3: Cross multiply
    139,661.75x = 209,493.03 × 50,915.12
  4. Step 4: Simplify right side
    139,661.75x = 10,666,361,905.08
  5. Step 5: Solve for x
    x = 10,666,361,905.08/139,661.75
  6. Step 6: Final answer
    x = 76,372.82

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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.