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Finding the Fourth Proportional to 81,053.46, 121,579.14 and 21,076.62

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Solution

The fourth proportional to 81,053.46, 121,579.14 and 21,076.62 is: 31,614.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,053.46 : 121,579.14 = 21,076.62 : x
  2. Step 2: Convert to fraction form
    81,053.46/121,579.14 = 21,076.62/x
  3. Step 3: Cross multiply
    81,053.46x = 121,579.14 × 21,076.62
  4. Step 4: Simplify right side
    81,053.46x = 2,562,477,333.71
  5. Step 5: Solve for x
    x = 2,562,477,333.71/81,053.46
  6. Step 6: Final answer
    x = 31,614.66

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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.