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Finding the Fourth Proportional to 90,383, 135,621.78 and 65,627.54

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Solution

The fourth proportional to 90,383, 135,621.78 and 65,627.54 is: 98,475.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,383 : 135,621.78 = 65,627.54 : x
  2. Step 2: Convert to fraction form
    90,383/135,621.78 = 65,627.54/x
  3. Step 3: Cross multiply
    90,383x = 135,621.78 × 65,627.54
  4. Step 4: Simplify right side
    90,383x = 8,900,523,791.82
  5. Step 5: Solve for x
    x = 8,900,523,791.82/90,383
  6. Step 6: Final answer
    x = 98,475.64

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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.