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Finding the Fourth Proportional to 99,329.80, 149,021.10 and 43,145.80

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Solution

The fourth proportional to 99,329.80, 149,021.10 and 43,145.80 is: 64,730.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,329.80 : 149,021.10 = 43,145.80 : x
  2. Step 2: Convert to fraction form
    99,329.80/149,021.10 = 43,145.80/x
  3. Step 3: Cross multiply
    99,329.80x = 149,021.10 × 43,145.80
  4. Step 4: Simplify right side
    99,329.80x = 6,429,634,576.38
  5. Step 5: Solve for x
    x = 6,429,634,576.38/99,329.80
  6. Step 6: Final answer
    x = 64,730.17

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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.