Home / 128,872.06-177,834.90-71,507.75

Finding the Fourth Proportional to 128,872.06, 177,834.90 and 71,507.75

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Solution

The fourth proportional to 128,872.06, 177,834.90 and 71,507.75 is: 98,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,872.06 : 177,834.90 = 71,507.75 : x
  2. Step 2: Convert to fraction form
    128,872.06/177,834.90 = 71,507.75/x
  3. Step 3: Cross multiply
    128,872.06x = 177,834.90 × 71,507.75
  4. Step 4: Simplify right side
    128,872.06x = 12,716,573,570.48
  5. Step 5: Solve for x
    x = 12,716,573,570.48/128,872.06
  6. Step 6: Final answer
    x = 98,675.95

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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.