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Finding the Fourth Proportional to 56,692.10, 85,070.55 and 21,656.90

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Solution

The fourth proportional to 56,692.10, 85,070.55 and 21,656.90 is: 32,497.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,692.10 : 85,070.55 = 21,656.90 : x
  2. Step 2: Convert to fraction form
    56,692.10/85,070.55 = 21,656.90/x
  3. Step 3: Cross multiply
    56,692.10x = 85,070.55 × 21,656.90
  4. Step 4: Simplify right side
    56,692.10x = 1,842,364,394.30
  5. Step 5: Solve for x
    x = 1,842,364,394.30/56,692.10
  6. Step 6: Final answer
    x = 32,497.73

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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.