Home / 84,328.70-126,638.85-81,704.30

Finding the Fourth Proportional to 84,328.70, 126,638.85 and 81,704.30

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Solution

The fourth proportional to 84,328.70, 126,638.85 and 81,704.30 is: 122,697.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,328.70 : 126,638.85 = 81,704.30 : x
  2. Step 2: Convert to fraction form
    84,328.70/126,638.85 = 81,704.30/x
  3. Step 3: Cross multiply
    84,328.70x = 126,638.85 × 81,704.30
  4. Step 4: Simplify right side
    84,328.70x = 10,346,938,592.06
  5. Step 5: Solve for x
    x = 10,346,938,592.06/84,328.70
  6. Step 6: Final answer
    x = 122,697.71

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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.