Home / 100,785.12-139,086.56-55,464.64

Finding the Fourth Proportional to 100,785.12, 139,086.56 and 55,464.64

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Solution

The fourth proportional to 100,785.12, 139,086.56 and 55,464.64 is: 76,542.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.12 : 139,086.56 = 55,464.64 : x
  2. Step 2: Convert to fraction form
    100,785.12/139,086.56 = 55,464.64/x
  3. Step 3: Cross multiply
    100,785.12x = 139,086.56 × 55,464.64
  4. Step 4: Simplify right side
    100,785.12x = 7,714,385,979.24
  5. Step 5: Solve for x
    x = 7,714,385,979.24/100,785.12
  6. Step 6: Final answer
    x = 76,542.91

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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.