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Finding the Fourth Proportional to 90,243, 135,331.02 and 40,273.56

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Solution

The fourth proportional to 90,243, 135,331.02 and 40,273.56 is: 60,395.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,243 : 135,331.02 = 40,273.56 : x
  2. Step 2: Convert to fraction form
    90,243/135,331.02 = 40,273.56/x
  3. Step 3: Cross multiply
    90,243x = 135,331.02 × 40,273.56
  4. Step 4: Simplify right side
    90,243x = 5,450,261,953.83
  5. Step 5: Solve for x
    x = 5,450,261,953.83/90,243
  6. Step 6: Final answer
    x = 60,395.40

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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.