Home / 129,188.49-178,279.96-71,826.02

Finding the Fourth Proportional to 129,188.49, 178,279.96 and 71,826.02

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Solution

The fourth proportional to 129,188.49, 178,279.96 and 71,826.02 is: 99,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,188.49 : 178,279.96 = 71,826.02 : x
  2. Step 2: Convert to fraction form
    129,188.49/178,279.96 = 71,826.02/x
  3. Step 3: Cross multiply
    129,188.49x = 178,279.96 × 71,826.02
  4. Step 4: Simplify right side
    129,188.49x = 12,805,139,405.42
  5. Step 5: Solve for x
    x = 12,805,139,405.42/129,188.49
  6. Step 6: Final answer
    x = 99,119.81

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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.