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Finding the Fourth Proportional to 117,660.80, 176,491.20 and 105,219.20

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Solution

The fourth proportional to 117,660.80, 176,491.20 and 105,219.20 is: 157,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,660.80 : 176,491.20 = 105,219.20 : x
  2. Step 2: Convert to fraction form
    117,660.80/176,491.20 = 105,219.20/x
  3. Step 3: Cross multiply
    117,660.80x = 176,491.20 × 105,219.20
  4. Step 4: Simplify right side
    117,660.80x = 18,570,262,871.04
  5. Step 5: Solve for x
    x = 18,570,262,871.04/117,660.80
  6. Step 6: Final answer
    x = 157,828.80

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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.