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Finding the Fourth Proportional to 67,116.80, 100,588.80 and 51,456.80

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Solution

The fourth proportional to 67,116.80, 100,588.80 and 51,456.80 is: 77,118.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,116.80 : 100,588.80 = 51,456.80 : x
  2. Step 2: Convert to fraction form
    67,116.80/100,588.80 = 51,456.80/x
  3. Step 3: Cross multiply
    67,116.80x = 100,588.80 × 51,456.80
  4. Step 4: Simplify right side
    67,116.80x = 5,175,977,763.84
  5. Step 5: Solve for x
    x = 5,175,977,763.84/67,116.80
  6. Step 6: Final answer
    x = 77,118.96

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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.