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Finding the Fourth Proportional to 66,021.70, 91,116.21 and 37,721.92

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Solution

The fourth proportional to 66,021.70, 91,116.21 and 37,721.92 is: 52,059.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.70 : 91,116.21 = 37,721.92 : x
  2. Step 2: Convert to fraction form
    66,021.70/91,116.21 = 37,721.92/x
  3. Step 3: Cross multiply
    66,021.70x = 91,116.21 × 37,721.92
  4. Step 4: Simplify right side
    66,021.70x = 3,437,078,384.32
  5. Step 5: Solve for x
    x = 3,437,078,384.32/66,021.70
  6. Step 6: Final answer
    x = 52,059.83

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1.5x scale

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.