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Finding the Fourth Proportional to 115,779, 159,769.62 and 64,798.26

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Solution

The fourth proportional to 115,779, 159,769.62 and 64,798.26 is: 89,418.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,779 : 159,769.62 = 64,798.26 : x
  2. Step 2: Convert to fraction form
    115,779/159,769.62 = 64,798.26/x
  3. Step 3: Cross multiply
    115,779x = 159,769.62 × 64,798.26
  4. Step 4: Simplify right side
    115,779x = 10,352,793,376.86
  5. Step 5: Solve for x
    x = 10,352,793,376.86/115,779
  6. Step 6: Final answer
    x = 89,418.58

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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.