Home / 73,140.60-109,635.30-39,790.20

Finding the Fourth Proportional to 73,140.60, 109,635.30 and 39,790.20

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Solution

The fourth proportional to 73,140.60, 109,635.30 and 39,790.20 is: 59,644.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,140.60 : 109,635.30 = 39,790.20 : x
  2. Step 2: Convert to fraction form
    73,140.60/109,635.30 = 39,790.20/x
  3. Step 3: Cross multiply
    73,140.60x = 109,635.30 × 39,790.20
  4. Step 4: Simplify right side
    73,140.60x = 4,362,410,514.06
  5. Step 5: Solve for x
    x = 4,362,410,514.06/73,140.60
  6. Step 6: Final answer
    x = 59,644.17

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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.