Home / 81,450.28-122,137.08-31,553.74

Finding the Fourth Proportional to 81,450.28, 122,137.08 and 31,553.74

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Solution

The fourth proportional to 81,450.28, 122,137.08 and 31,553.74 is: 47,315.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.28 : 122,137.08 = 31,553.74 : x
  2. Step 2: Convert to fraction form
    81,450.28/122,137.08 = 31,553.74/x
  3. Step 3: Cross multiply
    81,450.28x = 122,137.08 × 31,553.74
  4. Step 4: Simplify right side
    81,450.28x = 3,853,881,666.68
  5. Step 5: Solve for x
    x = 3,853,881,666.68/81,450.28
  6. Step 6: Final answer
    x = 47,315.76

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1.5x scale

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.