Home / 129,815.61-179,004.31-84,409.38

Finding the Fourth Proportional to 129,815.61, 179,004.31 and 84,409.38

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Solution

The fourth proportional to 129,815.61, 179,004.31 and 84,409.38 is: 116,393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,815.61 : 179,004.31 = 84,409.38 : x
  2. Step 2: Convert to fraction form
    129,815.61/179,004.31 = 84,409.38/x
  3. Step 3: Cross multiply
    129,815.61x = 179,004.31 × 84,409.38
  4. Step 4: Simplify right side
    129,815.61x = 15,109,643,524.12
  5. Step 5: Solve for x
    x = 15,109,643,524.12/129,815.61
  6. Step 6: Final answer
    x = 116,393.12

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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.