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Finding the Fourth Proportional to 85,692.76, 128,542.82 and 26,529.52

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Solution

The fourth proportional to 85,692.76, 128,542.82 and 26,529.52 is: 39,795.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,692.76 : 128,542.82 = 26,529.52 : x
  2. Step 2: Convert to fraction form
    85,692.76/128,542.82 = 26,529.52/x
  3. Step 3: Cross multiply
    85,692.76x = 128,542.82 × 26,529.52
  4. Step 4: Simplify right side
    85,692.76x = 3,410,179,314.05
  5. Step 5: Solve for x
    x = 3,410,179,314.05/85,692.76
  6. Step 6: Final answer
    x = 39,795.42

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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.