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Finding the Fourth Proportional to 117,351.60, 175,740.31 and 105,979.20

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Solution

The fourth proportional to 117,351.60, 175,740.31 and 105,979.20 is: 158,709.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,351.60 : 175,740.31 = 105,979.20 : x
  2. Step 2: Convert to fraction form
    117,351.60/175,740.31 = 105,979.20/x
  3. Step 3: Cross multiply
    117,351.60x = 175,740.31 × 105,979.20
  4. Step 4: Simplify right side
    117,351.60x = 18,624,816,931.66
  5. Step 5: Solve for x
    x = 18,624,816,931.66/117,351.60
  6. Step 6: Final answer
    x = 158,709.53

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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.