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Finding the Fourth Proportional to 90,000.20, 134,913.90 and 69,998.60

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Solution

The fourth proportional to 90,000.20, 134,913.90 and 69,998.60 is: 104,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,000.20 : 134,913.90 = 69,998.60 : x
  2. Step 2: Convert to fraction form
    90,000.20/134,913.90 = 69,998.60/x
  3. Step 3: Cross multiply
    90,000.20x = 134,913.90 × 69,998.60
  4. Step 4: Simplify right side
    90,000.20x = 9,443,784,120.54
  5. Step 5: Solve for x
    x = 9,443,784,120.54/90,000.20
  6. Step 6: Final answer
    x = 104,930.70

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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.