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Finding the Fourth Proportional to 109,853.80, 164,780.70 and 53,720.80

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Solution

The fourth proportional to 109,853.80, 164,780.70 and 53,720.80 is: 80,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,853.80 : 164,780.70 = 53,720.80 : x
  2. Step 2: Convert to fraction form
    109,853.80/164,780.70 = 53,720.80/x
  3. Step 3: Cross multiply
    109,853.80x = 164,780.70 × 53,720.80
  4. Step 4: Simplify right side
    109,853.80x = 8,852,151,028.56
  5. Step 5: Solve for x
    x = 8,852,151,028.56/109,853.80
  6. Step 6: Final answer
    x = 80,581.20

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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.