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Finding the Fourth Proportional to 136,918.80, 205,408.80 and 48,175.20

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Solution

The fourth proportional to 136,918.80, 205,408.80 and 48,175.20 is: 72,273.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,918.80 : 205,408.80 = 48,175.20 : x
  2. Step 2: Convert to fraction form
    136,918.80/205,408.80 = 48,175.20/x
  3. Step 3: Cross multiply
    136,918.80x = 205,408.80 × 48,175.20
  4. Step 4: Simplify right side
    136,918.80x = 9,895,610,021.76
  5. Step 5: Solve for x
    x = 9,895,610,021.76/136,918.80
  6. Step 6: Final answer
    x = 72,273.57

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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.