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Finding the Fourth Proportional to 120,653.60, 181,011.14 and 85,184.01

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Solution

The fourth proportional to 120,653.60, 181,011.14 and 85,184.01 is: 127,797.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,653.60 : 181,011.14 = 85,184.01 : x
  2. Step 2: Convert to fraction form
    120,653.60/181,011.14 = 85,184.01/x
  3. Step 3: Cross multiply
    120,653.60x = 181,011.14 × 85,184.01
  4. Step 4: Simplify right side
    120,653.60x = 15,419,254,333.95
  5. Step 5: Solve for x
    x = 15,419,254,333.95/120,653.60
  6. Step 6: Final answer
    x = 127,797.72

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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.