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Finding the Fourth Proportional to 85,423.44, 128,046 and 29,247

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Solution

The fourth proportional to 85,423.44, 128,046 and 29,247 is: 43,839.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,423.44 : 128,046 = 29,247 : x
  2. Step 2: Convert to fraction form
    85,423.44/128,046 = 29,247/x
  3. Step 3: Cross multiply
    85,423.44x = 128,046 × 29,247
  4. Step 4: Simplify right side
    85,423.44x = 3,744,961,362
  5. Step 5: Solve for x
    x = 3,744,961,362/85,423.44
  6. Step 6: Final answer
    x = 43,839.97

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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.