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Finding the Fourth Proportional to 87,320, 120,501.60 and 47,576

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Solution

The fourth proportional to 87,320, 120,501.60 and 47,576 is: 65,654.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,320 : 120,501.60 = 47,576 : x
  2. Step 2: Convert to fraction form
    87,320/120,501.60 = 47,576/x
  3. Step 3: Cross multiply
    87,320x = 120,501.60 × 47,576
  4. Step 4: Simplify right side
    87,320x = 5,732,984,121.60
  5. Step 5: Solve for x
    x = 5,732,984,121.60/87,320
  6. Step 6: Final answer
    x = 65,654.88

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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.