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Finding the Fourth Proportional to 104,912.40, 157,434.21 and 42,582.90

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Solution

The fourth proportional to 104,912.40, 157,434.21 and 42,582.90 is: 63,900.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,912.40 : 157,434.21 = 42,582.90 : x
  2. Step 2: Convert to fraction form
    104,912.40/157,434.21 = 42,582.90/x
  3. Step 3: Cross multiply
    104,912.40x = 157,434.21 × 42,582.90
  4. Step 4: Simplify right side
    104,912.40x = 6,704,005,221.01
  5. Step 5: Solve for x
    x = 6,704,005,221.01/104,912.40
  6. Step 6: Final answer
    x = 63,900.98

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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.