Home / 128,435.85-177,234.35-71,836.29

Finding the Fourth Proportional to 128,435.85, 177,234.35 and 71,836.29

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Solution

The fourth proportional to 128,435.85, 177,234.35 and 71,836.29 is: 99,130.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.85 : 177,234.35 = 71,836.29 : x
  2. Step 2: Convert to fraction form
    128,435.85/177,234.35 = 71,836.29/x
  3. Step 3: Cross multiply
    128,435.85x = 177,234.35 × 71,836.29
  4. Step 4: Simplify right side
    128,435.85x = 12,731,857,805.38
  5. Step 5: Solve for x
    x = 12,731,857,805.38/128,435.85
  6. Step 6: Final answer
    x = 99,130.09

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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.