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Finding the Fourth Proportional to 90,147.60, 135,243.54 and 30,984.12

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Solution

The fourth proportional to 90,147.60, 135,243.54 and 30,984.12 is: 46,483.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,147.60 : 135,243.54 = 30,984.12 : x
  2. Step 2: Convert to fraction form
    90,147.60/135,243.54 = 30,984.12/x
  3. Step 3: Cross multiply
    90,147.60x = 135,243.54 × 30,984.12
  4. Step 4: Simplify right side
    90,147.60x = 4,190,402,072.58
  5. Step 5: Solve for x
    x = 4,190,402,072.58/90,147.60
  6. Step 6: Final answer
    x = 46,483.79

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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.