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Finding the Fourth Proportional to 85,505.87, 128,282.30 and 35,609.33

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Solution

The fourth proportional to 85,505.87, 128,282.30 and 35,609.33 is: 53,423.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.87 : 128,282.30 = 35,609.33 : x
  2. Step 2: Convert to fraction form
    85,505.87/128,282.30 = 35,609.33/x
  3. Step 3: Cross multiply
    85,505.87x = 128,282.30 × 35,609.33
  4. Step 4: Simplify right side
    85,505.87x = 4,568,045,934.40
  5. Step 5: Solve for x
    x = 4,568,045,934.40/85,505.87
  6. Step 6: Final answer
    x = 53,423.77

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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.