Home / 128,422.26-177,230.61-71,837.46

Finding the Fourth Proportional to 128,422.26, 177,230.61 and 71,837.46

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Solution

The fourth proportional to 128,422.26, 177,230.61 and 71,837.46 is: 99,140.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,422.26 : 177,230.61 = 71,837.46 : x
  2. Step 2: Convert to fraction form
    128,422.26/177,230.61 = 71,837.46/x
  3. Step 3: Cross multiply
    128,422.26x = 177,230.61 × 71,837.46
  4. Step 4: Simplify right side
    128,422.26x = 12,731,796,856.65
  5. Step 5: Solve for x
    x = 12,731,796,856.65/128,422.26
  6. Step 6: Final answer
    x = 99,140.11

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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.