Home / 90,308.21-135,468.80-31,143.02

Finding the Fourth Proportional to 90,308.21, 135,468.80 and 31,143.02

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Solution

The fourth proportional to 90,308.21, 135,468.80 and 31,143.02 is: 46,716.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,308.21 : 135,468.80 = 31,143.02 : x
  2. Step 2: Convert to fraction form
    90,308.21/135,468.80 = 31,143.02/x
  3. Step 3: Cross multiply
    90,308.21x = 135,468.80 × 31,143.02
  4. Step 4: Simplify right side
    90,308.21x = 4,218,906,714.72
  5. Step 5: Solve for x
    x = 4,218,906,714.72/90,308.21
  6. Step 6: Final answer
    x = 46,716.76

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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.