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Finding the Fourth Proportional to 85,692.46, 128,544.81 and 26,520.52

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Solution

The fourth proportional to 85,692.46, 128,544.81 and 26,520.52 is: 39,782.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,692.46 : 128,544.81 = 26,520.52 : x
  2. Step 2: Convert to fraction form
    85,692.46/128,544.81 = 26,520.52/x
  3. Step 3: Cross multiply
    85,692.46x = 128,544.81 × 26,520.52
  4. Step 4: Simplify right side
    85,692.46x = 3,409,075,204.50
  5. Step 5: Solve for x
    x = 3,409,075,204.50/85,692.46
  6. Step 6: Final answer
    x = 39,782.67

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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.