Home / 85,109.97-127,778.04-72,709.68

Finding the Fourth Proportional to 85,109.97, 127,778.04 and 72,709.68

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Solution

The fourth proportional to 85,109.97, 127,778.04 and 72,709.68 is: 109,161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.97 : 127,778.04 = 72,709.68 : x
  2. Step 2: Convert to fraction form
    85,109.97/127,778.04 = 72,709.68/x
  3. Step 3: Cross multiply
    85,109.97x = 127,778.04 × 72,709.68
  4. Step 4: Simplify right side
    85,109.97x = 9,290,700,399.43
  5. Step 5: Solve for x
    x = 9,290,700,399.43/85,109.97
  6. Step 6: Final answer
    x = 109,161.13

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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.