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Finding the Fourth Proportional to 128,486.93, 192,449.71 and 53,379.35

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Solution

The fourth proportional to 128,486.93, 192,449.71 and 53,379.35 is: 79,952.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.93 : 192,449.71 = 53,379.35 : x
  2. Step 2: Convert to fraction form
    128,486.93/192,449.71 = 53,379.35/x
  3. Step 3: Cross multiply
    128,486.93x = 192,449.71 × 53,379.35
  4. Step 4: Simplify right side
    128,486.93x = 10,272,839,198.34
  5. Step 5: Solve for x
    x = 10,272,839,198.34/128,486.93
  6. Step 6: Final answer
    x = 79,952.41

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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.