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Finding the Fourth Proportional to 87,289.55, 120,459.71 and 49,563.80

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Solution

The fourth proportional to 87,289.55, 120,459.71 and 49,563.80 is: 68,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,289.55 : 120,459.71 = 49,563.80 : x
  2. Step 2: Convert to fraction form
    87,289.55/120,459.71 = 49,563.80/x
  3. Step 3: Cross multiply
    87,289.55x = 120,459.71 × 49,563.80
  4. Step 4: Simplify right side
    87,289.55x = 5,970,440,669.04
  5. Step 5: Solve for x
    x = 5,970,440,669.04/87,289.55
  6. Step 6: Final answer
    x = 68,398.12

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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.