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Finding the Fourth Proportional to 139,741.36, 209,644.56 and 39,902.92

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Solution

The fourth proportional to 139,741.36, 209,644.56 and 39,902.92 is: 59,863.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,741.36 : 209,644.56 = 39,902.92 : x
  2. Step 2: Convert to fraction form
    139,741.36/209,644.56 = 39,902.92/x
  3. Step 3: Cross multiply
    139,741.36x = 209,644.56 × 39,902.92
  4. Step 4: Simplify right side
    139,741.36x = 8,365,430,106.12
  5. Step 5: Solve for x
    x = 8,365,430,106.12/139,741.36
  6. Step 6: Final answer
    x = 59,863.67

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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.