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Finding the Fourth Proportional to 98,692.80, 136,199.58 and 56,244.48

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Solution

The fourth proportional to 98,692.80, 136,199.58 and 56,244.48 is: 77,619.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,692.80 : 136,199.58 = 56,244.48 : x
  2. Step 2: Convert to fraction form
    98,692.80/136,199.58 = 56,244.48/x
  3. Step 3: Cross multiply
    98,692.80x = 136,199.58 × 56,244.48
  4. Step 4: Simplify right side
    98,692.80x = 7,660,474,553.32
  5. Step 5: Solve for x
    x = 7,660,474,553.32/98,692.80
  6. Step 6: Final answer
    x = 77,619.39

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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.