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Finding the Fourth Proportional to 103,613.80, 155,190.30 and 89,789.80

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Solution

The fourth proportional to 103,613.80, 155,190.30 and 89,789.80 is: 134,485.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,613.80 : 155,190.30 = 89,789.80 : x
  2. Step 2: Convert to fraction form
    103,613.80/155,190.30 = 89,789.80/x
  3. Step 3: Cross multiply
    103,613.80x = 155,190.30 × 89,789.80
  4. Step 4: Simplify right side
    103,613.80x = 13,934,505,998.94
  5. Step 5: Solve for x
    x = 13,934,505,998.94/103,613.80
  6. Step 6: Final answer
    x = 134,485.04

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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.