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Finding the Fourth Proportional to 119,792, 179,696.64 and 45,920

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Solution

The fourth proportional to 119,792, 179,696.64 and 45,920 is: 68,883.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,792 : 179,696.64 = 45,920 : x
  2. Step 2: Convert to fraction form
    119,792/179,696.64 = 45,920/x
  3. Step 3: Cross multiply
    119,792x = 179,696.64 × 45,920
  4. Step 4: Simplify right side
    119,792x = 8,251,669,708.80
  5. Step 5: Solve for x
    x = 8,251,669,708.80/119,792
  6. Step 6: Final answer
    x = 68,883.31

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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.