Home / 128,633.45-177,575.88-90,425.75

Finding the Fourth Proportional to 128,633.45, 177,575.88 and 90,425.75

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Solution

The fourth proportional to 128,633.45, 177,575.88 and 90,425.75 is: 124,830.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,633.45 : 177,575.88 = 90,425.75 : x
  2. Step 2: Convert to fraction form
    128,633.45/177,575.88 = 90,425.75/x
  3. Step 3: Cross multiply
    128,633.45x = 177,575.88 × 90,425.75
  4. Step 4: Simplify right side
    128,633.45x = 16,057,432,072.35
  5. Step 5: Solve for x
    x = 16,057,432,072.35/128,633.45
  6. Step 6: Final answer
    x = 124,830.92

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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.