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Finding the Fourth Proportional to 76,989.60, 115,426.80 and 41,968.80

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Solution

The fourth proportional to 76,989.60, 115,426.80 and 41,968.80 is: 62,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,989.60 : 115,426.80 = 41,968.80 : x
  2. Step 2: Convert to fraction form
    76,989.60/115,426.80 = 41,968.80/x
  3. Step 3: Cross multiply
    76,989.60x = 115,426.80 × 41,968.80
  4. Step 4: Simplify right side
    76,989.60x = 4,844,324,283.84
  5. Step 5: Solve for x
    x = 4,844,324,283.84/76,989.60
  6. Step 6: Final answer
    x = 62,921.80

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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.