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Finding the Fourth Proportional to 64,268.85, 96,407.86 and 19,889.89

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Solution

The fourth proportional to 64,268.85, 96,407.86 and 19,889.89 is: 29,836.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,268.85 : 96,407.86 = 19,889.89 : x
  2. Step 2: Convert to fraction form
    64,268.85/96,407.86 = 19,889.89/x
  3. Step 3: Cross multiply
    64,268.85x = 96,407.86 × 19,889.89
  4. Step 4: Simplify right side
    64,268.85x = 1,917,541,680.81
  5. Step 5: Solve for x
    x = 1,917,541,680.81/64,268.85
  6. Step 6: Final answer
    x = 29,836.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.