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Finding the Fourth Proportional to 65,687.96, 90,649.48 and 37,393.64

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Solution

The fourth proportional to 65,687.96, 90,649.48 and 37,393.64 is: 51,603.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,687.96 : 90,649.48 = 37,393.64 : x
  2. Step 2: Convert to fraction form
    65,687.96/90,649.48 = 37,393.64/x
  3. Step 3: Cross multiply
    65,687.96x = 90,649.48 × 37,393.64
  4. Step 4: Simplify right side
    65,687.96x = 3,389,714,154.45
  5. Step 5: Solve for x
    x = 3,389,714,154.45/65,687.96
  6. Step 6: Final answer
    x = 51,603.28

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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.