Home / 131,426.60-197,139.90-81,822.20

Finding the Fourth Proportional to 131,426.60, 197,139.90 and 81,822.20

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Solution

The fourth proportional to 131,426.60, 197,139.90 and 81,822.20 is: 122,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,426.60 : 197,139.90 = 81,822.20 : x
  2. Step 2: Convert to fraction form
    131,426.60/197,139.90 = 81,822.20/x
  3. Step 3: Cross multiply
    131,426.60x = 197,139.90 × 81,822.20
  4. Step 4: Simplify right side
    131,426.60x = 16,130,420,325.78
  5. Step 5: Solve for x
    x = 16,130,420,325.78/131,426.60
  6. Step 6: Final answer
    x = 122,733.30

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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.