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Finding the Fourth Proportional to 66,621.45, 100,005.08 and 41,689.65

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Solution

The fourth proportional to 66,621.45, 100,005.08 and 41,689.65 is: 62,580.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,621.45 : 100,005.08 = 41,689.65 : x
  2. Step 2: Convert to fraction form
    66,621.45/100,005.08 = 41,689.65/x
  3. Step 3: Cross multiply
    66,621.45x = 100,005.08 × 41,689.65
  4. Step 4: Simplify right side
    66,621.45x = 4,169,176,574.97
  5. Step 5: Solve for x
    x = 4,169,176,574.97/66,621.45
  6. Step 6: Final answer
    x = 62,580.09

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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.