Home / 128,435.31-177,238.08-71,074.62

Finding the Fourth Proportional to 128,435.31, 177,238.08 and 71,074.62

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Solution

The fourth proportional to 128,435.31, 177,238.08 and 71,074.62 is: 98,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.31 : 177,238.08 = 71,074.62 : x
  2. Step 2: Convert to fraction form
    128,435.31/177,238.08 = 71,074.62/x
  3. Step 3: Cross multiply
    128,435.31x = 177,238.08 × 71,074.62
  4. Step 4: Simplify right side
    128,435.31x = 12,597,129,185.53
  5. Step 5: Solve for x
    x = 12,597,129,185.53/128,435.31
  6. Step 6: Final answer
    x = 98,081.51

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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.