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Finding the Fourth Proportional to 66,488.45, 99,665.64 and 34,934.09

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Solution

The fourth proportional to 66,488.45, 99,665.64 and 34,934.09 is: 52,365.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.45 : 99,665.64 = 34,934.09 : x
  2. Step 2: Convert to fraction form
    66,488.45/99,665.64 = 34,934.09/x
  3. Step 3: Cross multiply
    66,488.45x = 99,665.64 × 34,934.09
  4. Step 4: Simplify right side
    66,488.45x = 3,481,727,939.34
  5. Step 5: Solve for x
    x = 3,481,727,939.34/66,488.45
  6. Step 6: Final answer
    x = 52,365.91

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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.