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Finding the Fourth Proportional to 90,361.98, 135,589.44 and 43,030.74

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Solution

The fourth proportional to 90,361.98, 135,589.44 and 43,030.74 is: 64,568.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,361.98 : 135,589.44 = 43,030.74 : x
  2. Step 2: Convert to fraction form
    90,361.98/135,589.44 = 43,030.74/x
  3. Step 3: Cross multiply
    90,361.98x = 135,589.44 × 43,030.74
  4. Step 4: Simplify right side
    90,361.98x = 5,834,514,609.21
  5. Step 5: Solve for x
    x = 5,834,514,609.21/90,361.98
  6. Step 6: Final answer
    x = 64,568.25

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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.