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Finding the Fourth Proportional to 85,889.63, 128,834.46 and 46,523.63

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Solution

The fourth proportional to 85,889.63, 128,834.46 and 46,523.63 is: 69,785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,889.63 : 128,834.46 = 46,523.63 : x
  2. Step 2: Convert to fraction form
    85,889.63/128,834.46 = 46,523.63/x
  3. Step 3: Cross multiply
    85,889.63x = 128,834.46 × 46,523.63
  4. Step 4: Simplify right side
    85,889.63x = 5,993,847,113.15
  5. Step 5: Solve for x
    x = 5,993,847,113.15/85,889.63
  6. Step 6: Final answer
    x = 69,785.45

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Similar ratio
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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.