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Finding the Fourth Proportional to 128,243.16, 192,365.64 and 39,497.40

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Solution

The fourth proportional to 128,243.16, 192,365.64 and 39,497.40 is: 59,246.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,243.16 : 192,365.64 = 39,497.40 : x
  2. Step 2: Convert to fraction form
    128,243.16/192,365.64 = 39,497.40/x
  3. Step 3: Cross multiply
    128,243.16x = 192,365.64 × 39,497.40
  4. Step 4: Simplify right side
    128,243.16x = 7,597,942,629.34
  5. Step 5: Solve for x
    x = 7,597,942,629.34/128,243.16
  6. Step 6: Final answer
    x = 59,246.38

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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.