Home / 199,899.90-275,835.20-128,376.81

Finding the Fourth Proportional to 199,899.90, 275,835.20 and 128,376.81

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Solution

The fourth proportional to 199,899.90, 275,835.20 and 128,376.81 is: 177,142.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,899.90 : 275,835.20 = 128,376.81 : x
  2. Step 2: Convert to fraction form
    199,899.90/275,835.20 = 128,376.81/x
  3. Step 3: Cross multiply
    199,899.90x = 275,835.20 × 128,376.81
  4. Step 4: Simplify right side
    199,899.90x = 35,410,842,419.83
  5. Step 5: Solve for x
    x = 35,410,842,419.83/199,899.90
  6. Step 6: Final answer
    x = 177,142.87

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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.