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Finding the Fourth Proportional to 139,741.29, 209,349.48 and 108,423.45

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Solution

The fourth proportional to 139,741.29, 209,349.48 and 108,423.45 is: 162,431.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,741.29 : 209,349.48 = 108,423.45 : x
  2. Step 2: Convert to fraction form
    139,741.29/209,349.48 = 108,423.45/x
  3. Step 3: Cross multiply
    139,741.29x = 209,349.48 × 108,423.45
  4. Step 4: Simplify right side
    139,741.29x = 22,698,392,877.31
  5. Step 5: Solve for x
    x = 22,698,392,877.31/139,741.29
  6. Step 6: Final answer
    x = 162,431.54

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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.