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Finding the Fourth Proportional to 90,993.96, 136,404.54 and 31,791.06

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Solution

The fourth proportional to 90,993.96, 136,404.54 and 31,791.06 is: 47,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,993.96 : 136,404.54 = 31,791.06 : x
  2. Step 2: Convert to fraction form
    90,993.96/136,404.54 = 31,791.06/x
  3. Step 3: Cross multiply
    90,993.96x = 136,404.54 × 31,791.06
  4. Step 4: Simplify right side
    90,993.96x = 4,336,444,915.41
  5. Step 5: Solve for x
    x = 4,336,444,915.41/90,993.96
  6. Step 6: Final answer
    x = 47,656.40

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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.