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Finding the Fourth Proportional to 137,673.63, 206,485.81 and 87,605.01

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Solution

The fourth proportional to 137,673.63, 206,485.81 and 87,605.01 is: 131,391.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,673.63 : 206,485.81 = 87,605.01 : x
  2. Step 2: Convert to fraction form
    137,673.63/206,485.81 = 87,605.01/x
  3. Step 3: Cross multiply
    137,673.63x = 206,485.81 × 87,605.01
  4. Step 4: Simplify right side
    137,673.63x = 18,089,191,230.90
  5. Step 5: Solve for x
    x = 18,089,191,230.90/137,673.63
  6. Step 6: Final answer
    x = 131,391.84

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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.