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Finding the Fourth Proportional to 100,670.58, 138,922.47 and 55,348.52

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Solution

The fourth proportional to 100,670.58, 138,922.47 and 55,348.52 is: 76,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.58 : 138,922.47 = 55,348.52 : x
  2. Step 2: Convert to fraction form
    100,670.58/138,922.47 = 55,348.52/x
  3. Step 3: Cross multiply
    100,670.58x = 138,922.47 × 55,348.52
  4. Step 4: Simplify right side
    100,670.58x = 7,689,152,554.38
  5. Step 5: Solve for x
    x = 7,689,152,554.38/100,670.58
  6. Step 6: Final answer
    x = 76,379.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.