Home / 129,589.70-178,835.56-72,227.42

Finding the Fourth Proportional to 129,589.70, 178,835.56 and 72,227.42

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Solution

The fourth proportional to 129,589.70, 178,835.56 and 72,227.42 is: 99,674.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,589.70 : 178,835.56 = 72,227.42 : x
  2. Step 2: Convert to fraction form
    129,589.70/178,835.56 = 72,227.42/x
  3. Step 3: Cross multiply
    129,589.70x = 178,835.56 × 72,227.42
  4. Step 4: Simplify right side
    129,589.70x = 12,916,831,305.11
  5. Step 5: Solve for x
    x = 12,916,831,305.11/129,589.70
  6. Step 6: Final answer
    x = 99,674.83

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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.