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Finding the Fourth Proportional to 87,572.70, 120,852.86 and 53,580.64

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Solution

The fourth proportional to 87,572.70, 120,852.86 and 53,580.64 is: 73,942.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,572.70 : 120,852.86 = 53,580.64 : x
  2. Step 2: Convert to fraction form
    87,572.70/120,852.86 = 53,580.64/x
  3. Step 3: Cross multiply
    87,572.70x = 120,852.86 × 53,580.64
  4. Step 4: Simplify right side
    87,572.70x = 6,475,373,584.63
  5. Step 5: Solve for x
    x = 6,475,373,584.63/87,572.70
  6. Step 6: Final answer
    x = 73,942.83

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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.