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Finding the Fourth Proportional to 103,136.48, 154,748.82 and 43,178.96

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Solution

The fourth proportional to 103,136.48, 154,748.82 and 43,178.96 is: 64,786.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,136.48 : 154,748.82 = 43,178.96 : x
  2. Step 2: Convert to fraction form
    103,136.48/154,748.82 = 43,178.96/x
  3. Step 3: Cross multiply
    103,136.48x = 154,748.82 × 43,178.96
  4. Step 4: Simplify right side
    103,136.48x = 6,681,892,335.08
  5. Step 5: Solve for x
    x = 6,681,892,335.08/103,136.48
  6. Step 6: Final answer
    x = 64,786.90

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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.