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Finding the Fourth Proportional to 128,005.14, 192,000.48 and 39,258.39

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Solution

The fourth proportional to 128,005.14, 192,000.48 and 39,258.39 is: 58,885.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,005.14 : 192,000.48 = 39,258.39 : x
  2. Step 2: Convert to fraction form
    128,005.14/192,000.48 = 39,258.39/x
  3. Step 3: Cross multiply
    128,005.14x = 192,000.48 × 39,258.39
  4. Step 4: Simplify right side
    128,005.14x = 7,537,629,724.03
  5. Step 5: Solve for x
    x = 7,537,629,724.03/128,005.14
  6. Step 6: Final answer
    x = 58,885.37

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1.5x scale

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.