Home / 84,328.20-126,638.10-81,703.80

Finding the Fourth Proportional to 84,328.20, 126,638.10 and 81,703.80

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Solution

The fourth proportional to 84,328.20, 126,638.10 and 81,703.80 is: 122,696.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,328.20 : 126,638.10 = 81,703.80 : x
  2. Step 2: Convert to fraction form
    84,328.20/126,638.10 = 81,703.80/x
  3. Step 3: Cross multiply
    84,328.20x = 126,638.10 × 81,703.80
  4. Step 4: Simplify right side
    84,328.20x = 10,346,813,994.78
  5. Step 5: Solve for x
    x = 10,346,813,994.78/84,328.20
  6. Step 6: Final answer
    x = 122,696.96

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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.