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Finding the Fourth Proportional to 83,660, 125,486.40 and 21,328.64

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Solution

The fourth proportional to 83,660, 125,486.40 and 21,328.64 is: 31,992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,660 : 125,486.40 = 21,328.64 : x
  2. Step 2: Convert to fraction form
    83,660/125,486.40 = 21,328.64/x
  3. Step 3: Cross multiply
    83,660x = 125,486.40 × 21,328.64
  4. Step 4: Simplify right side
    83,660x = 2,676,454,250.50
  5. Step 5: Solve for x
    x = 2,676,454,250.50/83,660
  6. Step 6: Final answer
    x = 31,992.04

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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.