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Finding the Fourth Proportional to 228,692.56, 315,596.64 and 128,090.56

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Solution

The fourth proportional to 228,692.56, 315,596.64 and 128,090.56 is: 176,765.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,692.56 : 315,596.64 = 128,090.56 : x
  2. Step 2: Convert to fraction form
    228,692.56/315,596.64 = 128,090.56/x
  3. Step 3: Cross multiply
    228,692.56x = 315,596.64 × 128,090.56
  4. Step 4: Simplify right side
    228,692.56x = 40,424,950,351.72
  5. Step 5: Solve for x
    x = 40,424,950,351.72/228,692.56
  6. Step 6: Final answer
    x = 176,765.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.