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Finding the Fourth Proportional to 80,696.90, 120,918.80 and 51,052.11

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Solution

The fourth proportional to 80,696.90, 120,918.80 and 51,052.11 is: 76,498.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,696.90 : 120,918.80 = 51,052.11 : x
  2. Step 2: Convert to fraction form
    80,696.90/120,918.80 = 51,052.11/x
  3. Step 3: Cross multiply
    80,696.90x = 120,918.80 × 51,052.11
  4. Step 4: Simplify right side
    80,696.90x = 6,173,159,878.67
  5. Step 5: Solve for x
    x = 6,173,159,878.67/80,696.90
  6. Step 6: Final answer
    x = 76,498.10

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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.