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Finding the Fourth Proportional to 128,345.73, 192,507.66 and 39,599.97

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Solution

The fourth proportional to 128,345.73, 192,507.66 and 39,599.97 is: 59,396.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,345.73 : 192,507.66 = 39,599.97 : x
  2. Step 2: Convert to fraction form
    128,345.73/192,507.66 = 39,599.97/x
  3. Step 3: Cross multiply
    128,345.73x = 192,507.66 × 39,599.97
  4. Step 4: Simplify right side
    128,345.73x = 7,623,297,560.77
  5. Step 5: Solve for x
    x = 7,623,297,560.77/128,345.73
  6. Step 6: Final answer
    x = 59,396.58

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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.