Home / 109,663.20-164,276.10-76,420.80

Finding the Fourth Proportional to 109,663.20, 164,276.10 and 76,420.80

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Solution

The fourth proportional to 109,663.20, 164,276.10 and 76,420.80 is: 114,478.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,663.20 : 164,276.10 = 76,420.80 : x
  2. Step 2: Convert to fraction form
    109,663.20/164,276.10 = 76,420.80/x
  3. Step 3: Cross multiply
    109,663.20x = 164,276.10 × 76,420.80
  4. Step 4: Simplify right side
    109,663.20x = 12,554,110,982.88
  5. Step 5: Solve for x
    x = 12,554,110,982.88/109,663.20
  6. Step 6: Final answer
    x = 114,478.79

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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.