Home / 115,513.57-173,186.37-77,981

Finding the Fourth Proportional to 115,513.57, 173,186.37 and 77,981

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Solution

The fourth proportional to 115,513.57, 173,186.37 and 77,981 is: 116,914.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,513.57 : 173,186.37 = 77,981 : x
  2. Step 2: Convert to fraction form
    115,513.57/173,186.37 = 77,981/x
  3. Step 3: Cross multiply
    115,513.57x = 173,186.37 × 77,981
  4. Step 4: Simplify right side
    115,513.57x = 13,505,246,318.97
  5. Step 5: Solve for x
    x = 13,505,246,318.97/115,513.57
  6. Step 6: Final answer
    x = 116,914.80

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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.