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Finding the Fourth Proportional to 109,876.80, 164,815.20 and 83,632.80

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Solution

The fourth proportional to 109,876.80, 164,815.20 and 83,632.80 is: 125,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,876.80 : 164,815.20 = 83,632.80 : x
  2. Step 2: Convert to fraction form
    109,876.80/164,815.20 = 83,632.80/x
  3. Step 3: Cross multiply
    109,876.80x = 164,815.20 × 83,632.80
  4. Step 4: Simplify right side
    109,876.80x = 13,783,956,658.56
  5. Step 5: Solve for x
    x = 13,783,956,658.56/109,876.80
  6. Step 6: Final answer
    x = 125,449.20

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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.