Home / 84,025.12-126,015.68-39,640.16

Finding the Fourth Proportional to 84,025.12, 126,015.68 and 39,640.16

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Solution

The fourth proportional to 84,025.12, 126,015.68 and 39,640.16 is: 59,449.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,025.12 : 126,015.68 = 39,640.16 : x
  2. Step 2: Convert to fraction form
    84,025.12/126,015.68 = 39,640.16/x
  3. Step 3: Cross multiply
    84,025.12x = 126,015.68 × 39,640.16
  4. Step 4: Simplify right side
    84,025.12x = 4,995,281,717.71
  5. Step 5: Solve for x
    x = 4,995,281,717.71/84,025.12
  6. Step 6: Final answer
    x = 59,449.86

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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.