Home / 109,974.30-164,961.45-81,980.70

Finding the Fourth Proportional to 109,974.30, 164,961.45 and 81,980.70

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Solution

The fourth proportional to 109,974.30, 164,961.45 and 81,980.70 is: 122,971.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,974.30 : 164,961.45 = 81,980.70 : x
  2. Step 2: Convert to fraction form
    109,974.30/164,961.45 = 81,980.70/x
  3. Step 3: Cross multiply
    109,974.30x = 164,961.45 × 81,980.70
  4. Step 4: Simplify right side
    109,974.30x = 13,523,655,144.02
  5. Step 5: Solve for x
    x = 13,523,655,144.02/109,974.30
  6. Step 6: Final answer
    x = 122,971.05

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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.