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Finding the Fourth Proportional to 76,840.80, 115,390.80 and 50,661.60

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Solution

The fourth proportional to 76,840.80, 115,390.80 and 50,661.60 is: 76,077.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,840.80 : 115,390.80 = 50,661.60 : x
  2. Step 2: Convert to fraction form
    76,840.80/115,390.80 = 50,661.60/x
  3. Step 3: Cross multiply
    76,840.80x = 115,390.80 × 50,661.60
  4. Step 4: Simplify right side
    76,840.80x = 5,845,882,553.28
  5. Step 5: Solve for x
    x = 5,845,882,553.28/76,840.80
  6. Step 6: Final answer
    x = 76,077.85

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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.