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Finding the Fourth Proportional to 128,310.93, 192,454.01 and 39,540.60

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Solution

The fourth proportional to 128,310.93, 192,454.01 and 39,540.60 is: 59,307.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.93 : 192,454.01 = 39,540.60 : x
  2. Step 2: Convert to fraction form
    128,310.93/192,454.01 = 39,540.60/x
  3. Step 3: Cross multiply
    128,310.93x = 192,454.01 × 39,540.60
  4. Step 4: Simplify right side
    128,310.93x = 7,609,747,027.81
  5. Step 5: Solve for x
    x = 7,609,747,027.81/128,310.93
  6. Step 6: Final answer
    x = 59,307.08

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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.