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Finding the Fourth Proportional to 291,773.80, 437,660.70 and 81,411.40

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Solution

The fourth proportional to 291,773.80, 437,660.70 and 81,411.40 is: 122,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,773.80 : 437,660.70 = 81,411.40 : x
  2. Step 2: Convert to fraction form
    291,773.80/437,660.70 = 81,411.40/x
  3. Step 3: Cross multiply
    291,773.80x = 437,660.70 × 81,411.40
  4. Step 4: Simplify right side
    291,773.80x = 35,630,570,311.98
  5. Step 5: Solve for x
    x = 35,630,570,311.98/291,773.80
  6. Step 6: Final answer
    x = 122,117.10

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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.