Home / 131,730.80-181,823.64-81,401.36

Finding the Fourth Proportional to 131,730.80, 181,823.64 and 81,401.36

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Solution

The fourth proportional to 131,730.80, 181,823.64 and 81,401.36 is: 112,355.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,730.80 : 181,823.64 = 81,401.36 : x
  2. Step 2: Convert to fraction form
    131,730.80/181,823.64 = 81,401.36/x
  3. Step 3: Cross multiply
    131,730.80x = 181,823.64 × 81,401.36
  4. Step 4: Simplify right side
    131,730.80x = 14,800,691,576.15
  5. Step 5: Solve for x
    x = 14,800,691,576.15/131,730.80
  6. Step 6: Final answer
    x = 112,355.59

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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.