Home / 123,719.87-170,628.12-83,380.66

Finding the Fourth Proportional to 123,719.87, 170,628.12 and 83,380.66

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Solution

The fourth proportional to 123,719.87, 170,628.12 and 83,380.66 is: 114,994.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,719.87 : 170,628.12 = 83,380.66 : x
  2. Step 2: Convert to fraction form
    123,719.87/170,628.12 = 83,380.66/x
  3. Step 3: Cross multiply
    123,719.87x = 170,628.12 × 83,380.66
  4. Step 4: Simplify right side
    123,719.87x = 14,227,084,833.59
  5. Step 5: Solve for x
    x = 14,227,084,833.59/123,719.87
  6. Step 6: Final answer
    x = 114,994.34

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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.