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Finding the Fourth Proportional to 85,571, 128,408.34 and 36,323

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Solution

The fourth proportional to 85,571, 128,408.34 and 36,323 is: 54,506.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,571 : 128,408.34 = 36,323 : x
  2. Step 2: Convert to fraction form
    85,571/128,408.34 = 36,323/x
  3. Step 3: Cross multiply
    85,571x = 128,408.34 × 36,323
  4. Step 4: Simplify right side
    85,571x = 4,664,176,133.82
  5. Step 5: Solve for x
    x = 4,664,176,133.82/85,571
  6. Step 6: Final answer
    x = 54,506.50

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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.