Home / 423,742.12-635,544.06-128,185

Finding the Fourth Proportional to 423,742.12, 635,544.06 and 128,185

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Solution

The fourth proportional to 423,742.12, 635,544.06 and 128,185 is: 192,256.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,742.12 : 635,544.06 = 128,185 : x
  2. Step 2: Convert to fraction form
    423,742.12/635,544.06 = 128,185/x
  3. Step 3: Cross multiply
    423,742.12x = 635,544.06 × 128,185
  4. Step 4: Simplify right side
    423,742.12x = 81,467,215,331.10
  5. Step 5: Solve for x
    x = 81,467,215,331.10/423,742.12
  6. Step 6: Final answer
    x = 192,256.59

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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.