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Finding the Fourth Proportional to 90,010.20, 134,723.70 and 79,512.60

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Solution

The fourth proportional to 90,010.20, 134,723.70 and 79,512.60 is: 119,011.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,010.20 : 134,723.70 = 79,512.60 : x
  2. Step 2: Convert to fraction form
    90,010.20/134,723.70 = 79,512.60/x
  3. Step 3: Cross multiply
    90,010.20x = 134,723.70 × 79,512.60
  4. Step 4: Simplify right side
    90,010.20x = 10,712,231,668.62
  5. Step 5: Solve for x
    x = 10,712,231,668.62/90,010.20
  6. Step 6: Final answer
    x = 119,011.31

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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.