Home / 131,443.40-197,165.10-81,579.80

Finding the Fourth Proportional to 131,443.40, 197,165.10 and 81,579.80

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Solution

The fourth proportional to 131,443.40, 197,165.10 and 81,579.80 is: 122,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,443.40 : 197,165.10 = 81,579.80 : x
  2. Step 2: Convert to fraction form
    131,443.40/197,165.10 = 81,579.80/x
  3. Step 3: Cross multiply
    131,443.40x = 197,165.10 × 81,579.80
  4. Step 4: Simplify right side
    131,443.40x = 16,084,689,424.98
  5. Step 5: Solve for x
    x = 16,084,689,424.98/131,443.40
  6. Step 6: Final answer
    x = 122,369.70

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1.5x scale

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.