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Finding the Fourth Proportional to 180,407.43, 270,605.55 and 85,705.80

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Solution

The fourth proportional to 180,407.43, 270,605.55 and 85,705.80 is: 128,556.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,407.43 : 270,605.55 = 85,705.80 : x
  2. Step 2: Convert to fraction form
    180,407.43/270,605.55 = 85,705.80/x
  3. Step 3: Cross multiply
    180,407.43x = 270,605.55 × 85,705.80
  4. Step 4: Simplify right side
    180,407.43x = 23,192,465,147.19
  5. Step 5: Solve for x
    x = 23,192,465,147.19/180,407.43
  6. Step 6: Final answer
    x = 128,556.04

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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.