Home / 99,121.78-148,830.29-40,072.78

Finding the Fourth Proportional to 99,121.78, 148,830.29 and 40,072.78

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Solution

The fourth proportional to 99,121.78, 148,830.29 and 40,072.78 is: 60,168.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,121.78 : 148,830.29 = 40,072.78 : x
  2. Step 2: Convert to fraction form
    99,121.78/148,830.29 = 40,072.78/x
  3. Step 3: Cross multiply
    99,121.78x = 148,830.29 × 40,072.78
  4. Step 4: Simplify right side
    99,121.78x = 5,964,043,468.51
  5. Step 5: Solve for x
    x = 5,964,043,468.51/99,121.78
  6. Step 6: Final answer
    x = 60,168.85

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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.