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Finding the Fourth Proportional to 58,420.70, 87,631.05 and 36,161.90

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Solution

The fourth proportional to 58,420.70, 87,631.05 and 36,161.90 is: 54,242.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,420.70 : 87,631.05 = 36,161.90 : x
  2. Step 2: Convert to fraction form
    58,420.70/87,631.05 = 36,161.90/x
  3. Step 3: Cross multiply
    58,420.70x = 87,631.05 × 36,161.90
  4. Step 4: Simplify right side
    58,420.70x = 3,168,905,267.00
  5. Step 5: Solve for x
    x = 3,168,905,267.00/58,420.70
  6. Step 6: Final answer
    x = 54,242.85

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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.