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Finding the Fourth Proportional to 87,323, 120,505.74 and 47,579

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Solution

The fourth proportional to 87,323, 120,505.74 and 47,579 is: 65,659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,323 : 120,505.74 = 47,579 : x
  2. Step 2: Convert to fraction form
    87,323/120,505.74 = 47,579/x
  3. Step 3: Cross multiply
    87,323x = 120,505.74 × 47,579
  4. Step 4: Simplify right side
    87,323x = 5,733,542,603.46
  5. Step 5: Solve for x
    x = 5,733,542,603.46/87,323
  6. Step 6: Final answer
    x = 65,659.02

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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.