Home / 128,996.40-193,487.78-40,239.74

Finding the Fourth Proportional to 128,996.40, 193,487.78 and 40,239.74

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Solution

The fourth proportional to 128,996.40, 193,487.78 and 40,239.74 is: 60,357.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,996.40 : 193,487.78 = 40,239.74 : x
  2. Step 2: Convert to fraction form
    128,996.40/193,487.78 = 40,239.74/x
  3. Step 3: Cross multiply
    128,996.40x = 193,487.78 × 40,239.74
  4. Step 4: Simplify right side
    128,996.40x = 7,785,897,960.38
  5. Step 5: Solve for x
    x = 7,785,897,960.38/128,996.40
  6. Step 6: Final answer
    x = 60,357.48

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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.