Home / 131,410.10-197,115.15-81,805.70

Finding the Fourth Proportional to 131,410.10, 197,115.15 and 81,805.70

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Solution

The fourth proportional to 131,410.10, 197,115.15 and 81,805.70 is: 122,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,410.10 : 197,115.15 = 81,805.70 : x
  2. Step 2: Convert to fraction form
    131,410.10/197,115.15 = 81,805.70/x
  3. Step 3: Cross multiply
    131,410.10x = 197,115.15 × 81,805.70
  4. Step 4: Simplify right side
    131,410.10x = 16,125,142,826.36
  5. Step 5: Solve for x
    x = 16,125,142,826.36/131,410.10
  6. Step 6: Final answer
    x = 122,708.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.