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Finding the Fourth Proportional to 66,898.69, 92,285.05 and 40,033.21

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Solution

The fourth proportional to 66,898.69, 92,285.05 and 40,033.21 is: 55,224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,898.69 : 92,285.05 = 40,033.21 : x
  2. Step 2: Convert to fraction form
    66,898.69/92,285.05 = 40,033.21/x
  3. Step 3: Cross multiply
    66,898.69x = 92,285.05 × 40,033.21
  4. Step 4: Simplify right side
    66,898.69x = 3,694,466,786.51
  5. Step 5: Solve for x
    x = 3,694,466,786.51/66,898.69
  6. Step 6: Final answer
    x = 55,224.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.