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Finding the Fourth Proportional to 73,215.75, 109,698.25 and 39,959.15

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Solution

The fourth proportional to 73,215.75, 109,698.25 and 39,959.15 is: 59,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,215.75 : 109,698.25 = 39,959.15 : x
  2. Step 2: Convert to fraction form
    73,215.75/109,698.25 = 39,959.15/x
  3. Step 3: Cross multiply
    73,215.75x = 109,698.25 × 39,959.15
  4. Step 4: Simplify right side
    73,215.75x = 4,383,448,561.55
  5. Step 5: Solve for x
    x = 4,383,448,561.55/73,215.75
  6. Step 6: Final answer
    x = 59,870.30

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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.