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Finding the Fourth Proportional to 109,660.80, 164,491.20 and 83,416.80

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Solution

The fourth proportional to 109,660.80, 164,491.20 and 83,416.80 is: 125,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,660.80 : 164,491.20 = 83,416.80 : x
  2. Step 2: Convert to fraction form
    109,660.80/164,491.20 = 83,416.80/x
  3. Step 3: Cross multiply
    109,660.80x = 164,491.20 × 83,416.80
  4. Step 4: Simplify right side
    109,660.80x = 13,721,329,532.16
  5. Step 5: Solve for x
    x = 13,721,329,532.16/109,660.80
  6. Step 6: Final answer
    x = 125,125.20

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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.