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Finding the Fourth Proportional to 115,779.78, 173,357.42 and 75,699.36

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Solution

The fourth proportional to 115,779.78, 173,357.42 and 75,699.36 is: 113,344.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,779.78 : 173,357.42 = 75,699.36 : x
  2. Step 2: Convert to fraction form
    115,779.78/173,357.42 = 75,699.36/x
  3. Step 3: Cross multiply
    115,779.78x = 173,357.42 × 75,699.36
  4. Step 4: Simplify right side
    115,779.78x = 13,123,045,366.75
  5. Step 5: Solve for x
    x = 13,123,045,366.75/115,779.78
  6. Step 6: Final answer
    x = 113,344.88

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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.