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Finding the Fourth Proportional to 65,999.64, 91,042.74 and 39,116.28

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Solution

The fourth proportional to 65,999.64, 91,042.74 and 39,116.28 is: 53,958.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,999.64 : 91,042.74 = 39,116.28 : x
  2. Step 2: Convert to fraction form
    65,999.64/91,042.74 = 39,116.28/x
  3. Step 3: Cross multiply
    65,999.64x = 91,042.74 × 39,116.28
  4. Step 4: Simplify right side
    65,999.64x = 3,561,253,309.81
  5. Step 5: Solve for x
    x = 3,561,253,309.81/65,999.64
  6. Step 6: Final answer
    x = 53,958.68

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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.