Home / 102,821.20-154,116.60-43,646.80

Finding the Fourth Proportional to 102,821.20, 154,116.60 and 43,646.80

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Solution

The fourth proportional to 102,821.20, 154,116.60 and 43,646.80 is: 65,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,821.20 : 154,116.60 = 43,646.80 : x
  2. Step 2: Convert to fraction form
    102,821.20/154,116.60 = 43,646.80/x
  3. Step 3: Cross multiply
    102,821.20x = 154,116.60 × 43,646.80
  4. Step 4: Simplify right side
    102,821.20x = 6,726,696,416.88
  5. Step 5: Solve for x
    x = 6,726,696,416.88/102,821.20
  6. Step 6: Final answer
    x = 65,421.30

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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.