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Finding the Fourth Proportional to 103,699.87, 155,642.52 and 53,133.39

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Solution

The fourth proportional to 103,699.87, 155,642.52 and 53,133.39 is: 79,747.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,699.87 : 155,642.52 = 53,133.39 : x
  2. Step 2: Convert to fraction form
    103,699.87/155,642.52 = 53,133.39/x
  3. Step 3: Cross multiply
    103,699.87x = 155,642.52 × 53,133.39
  4. Step 4: Simplify right side
    103,699.87x = 8,269,814,450.08
  5. Step 5: Solve for x
    x = 8,269,814,450.08/103,699.87
  6. Step 6: Final answer
    x = 79,747.59

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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.