Home / 90,636.32-124,767.60-78,628.96

Finding the Fourth Proportional to 90,636.32, 124,767.60 and 78,628.96

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Solution

The fourth proportional to 90,636.32, 124,767.60 and 78,628.96 is: 108,238.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,636.32 : 124,767.60 = 78,628.96 : x
  2. Step 2: Convert to fraction form
    90,636.32/124,767.60 = 78,628.96/x
  3. Step 3: Cross multiply
    90,636.32x = 124,767.60 × 78,628.96
  4. Step 4: Simplify right side
    90,636.32x = 9,810,346,629.70
  5. Step 5: Solve for x
    x = 9,810,346,629.70/90,636.32
  6. Step 6: Final answer
    x = 108,238.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.