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Finding the Fourth Proportional to 85,939.97, 128,960.99 and 46,496.21

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Solution

The fourth proportional to 85,939.97, 128,960.99 and 46,496.21 is: 69,771.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,939.97 : 128,960.99 = 46,496.21 : x
  2. Step 2: Convert to fraction form
    85,939.97/128,960.99 = 46,496.21/x
  3. Step 3: Cross multiply
    85,939.97x = 128,960.99 × 46,496.21
  4. Step 4: Simplify right side
    85,939.97x = 5,996,197,272.85
  5. Step 5: Solve for x
    x = 5,996,197,272.85/85,939.97
  6. Step 6: Final answer
    x = 69,771.93

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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.