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Finding the Fourth Proportional to 80,692.40, 120,779.40 and 57,364.40

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Solution

The fourth proportional to 80,692.40, 120,779.40 and 57,364.40 is: 85,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,692.40 : 120,779.40 = 57,364.40 : x
  2. Step 2: Convert to fraction form
    80,692.40/120,779.40 = 57,364.40/x
  3. Step 3: Cross multiply
    80,692.40x = 120,779.40 × 57,364.40
  4. Step 4: Simplify right side
    80,692.40x = 6,928,437,813.36
  5. Step 5: Solve for x
    x = 6,928,437,813.36/80,692.40
  6. Step 6: Final answer
    x = 85,862.33

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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.