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Finding the Fourth Proportional to 128,483.34, 192,774.69 and 49,575.66

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Solution

The fourth proportional to 128,483.34, 192,774.69 and 49,575.66 is: 74,382.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,483.34 : 192,774.69 = 49,575.66 : x
  2. Step 2: Convert to fraction form
    128,483.34/192,774.69 = 49,575.66/x
  3. Step 3: Cross multiply
    128,483.34x = 192,774.69 × 49,575.66
  4. Step 4: Simplify right side
    128,483.34x = 9,556,932,488.05
  5. Step 5: Solve for x
    x = 9,556,932,488.05/128,483.34
  6. Step 6: Final answer
    x = 74,382.66

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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.