Home / 85,887.10-128,842.80-26,716.60

Finding the Fourth Proportional to 85,887.10, 128,842.80 and 26,716.60

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Solution

The fourth proportional to 85,887.10, 128,842.80 and 26,716.60 is: 40,078.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,887.10 : 128,842.80 = 26,716.60 : x
  2. Step 2: Convert to fraction form
    85,887.10/128,842.80 = 26,716.60/x
  3. Step 3: Cross multiply
    85,887.10x = 128,842.80 × 26,716.60
  4. Step 4: Simplify right side
    85,887.10x = 3,442,241,550.48
  5. Step 5: Solve for x
    x = 3,442,241,550.48/85,887.10
  6. Step 6: Final answer
    x = 40,078.68

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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.