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Finding the Fourth Proportional to 117,991.20, 176,871.60 and 105,549.60

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Solution

The fourth proportional to 117,991.20, 176,871.60 and 105,549.60 is: 158,221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,991.20 : 176,871.60 = 105,549.60 : x
  2. Step 2: Convert to fraction form
    117,991.20/176,871.60 = 105,549.60/x
  3. Step 3: Cross multiply
    117,991.20x = 176,871.60 × 105,549.60
  4. Step 4: Simplify right side
    117,991.20x = 18,668,726,631.36
  5. Step 5: Solve for x
    x = 18,668,726,631.36/117,991.20
  6. Step 6: Final answer
    x = 158,221.35

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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.