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Finding the Fourth Proportional to 65,809.26, 90,816.68 and 37,128.88

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Solution

The fourth proportional to 65,809.26, 90,816.68 and 37,128.88 is: 51,237.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,809.26 : 90,816.68 = 37,128.88 : x
  2. Step 2: Convert to fraction form
    65,809.26/90,816.68 = 37,128.88/x
  3. Step 3: Cross multiply
    65,809.26x = 90,816.68 × 37,128.88
  4. Step 4: Simplify right side
    65,809.26x = 3,371,920,973.99
  5. Step 5: Solve for x
    x = 3,371,920,973.99/65,809.26
  6. Step 6: Final answer
    x = 51,237.79

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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.