Home / 147,954.10-221,821.80-81,469.30

Finding the Fourth Proportional to 147,954.10, 221,821.80 and 81,469.30

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Solution

The fourth proportional to 147,954.10, 221,821.80 and 81,469.30 is: 122,143.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,954.10 : 221,821.80 = 81,469.30 : x
  2. Step 2: Convert to fraction form
    147,954.10/221,821.80 = 81,469.30/x
  3. Step 3: Cross multiply
    147,954.10x = 221,821.80 × 81,469.30
  4. Step 4: Simplify right side
    147,954.10x = 18,071,666,770.74
  5. Step 5: Solve for x
    x = 18,071,666,770.74/147,954.10
  6. Step 6: Final answer
    x = 122,143.74

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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.