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Finding the Fourth Proportional to 85,623.01, 128,471.27 and 33,069.40

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Solution

The fourth proportional to 85,623.01, 128,471.27 and 33,069.40 is: 49,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,623.01 : 128,471.27 = 33,069.40 : x
  2. Step 2: Convert to fraction form
    85,623.01/128,471.27 = 33,069.40/x
  3. Step 3: Cross multiply
    85,623.01x = 128,471.27 × 33,069.40
  4. Step 4: Simplify right side
    85,623.01x = 4,248,467,329.61
  5. Step 5: Solve for x
    x = 4,248,467,329.61/85,623.01
  6. Step 6: Final answer
    x = 49,618.29

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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.