Home / 76,845.40-115,268.10-45,664.60

Finding the Fourth Proportional to 76,845.40, 115,268.10 and 45,664.60

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Solution

The fourth proportional to 76,845.40, 115,268.10 and 45,664.60 is: 68,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,845.40 : 115,268.10 = 45,664.60 : x
  2. Step 2: Convert to fraction form
    76,845.40/115,268.10 = 45,664.60/x
  3. Step 3: Cross multiply
    76,845.40x = 115,268.10 × 45,664.60
  4. Step 4: Simplify right side
    76,845.40x = 5,263,671,679.26
  5. Step 5: Solve for x
    x = 5,263,671,679.26/76,845.40
  6. Step 6: Final answer
    x = 68,496.90

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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.