Home / 128,213.21-176,906.84-74,470.42

Finding the Fourth Proportional to 128,213.21, 176,906.84 and 74,470.42

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Solution

The fourth proportional to 128,213.21, 176,906.84 and 74,470.42 is: 102,753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.21 : 176,906.84 = 74,470.42 : x
  2. Step 2: Convert to fraction form
    128,213.21/176,906.84 = 74,470.42/x
  3. Step 3: Cross multiply
    128,213.21x = 176,906.84 × 74,470.42
  4. Step 4: Simplify right side
    128,213.21x = 13,174,326,524.45
  5. Step 5: Solve for x
    x = 13,174,326,524.45/128,213.21
  6. Step 6: Final answer
    x = 102,753.27

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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.