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Finding the Fourth Proportional to 137,888.72, 206,839.04 and 43,120.72

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Solution

The fourth proportional to 137,888.72, 206,839.04 and 43,120.72 is: 64,682.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,888.72 : 206,839.04 = 43,120.72 : x
  2. Step 2: Convert to fraction form
    137,888.72/206,839.04 = 43,120.72/x
  3. Step 3: Cross multiply
    137,888.72x = 206,839.04 × 43,120.72
  4. Step 4: Simplify right side
    137,888.72x = 8,919,048,328.91
  5. Step 5: Solve for x
    x = 8,919,048,328.91/137,888.72
  6. Step 6: Final answer
    x = 64,682.94

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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.