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Finding the Third Proportional to 75,641.75 and 102,779.50

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Solution

The third proportional to 75,641.75 and 102,779.50 is: 139,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,641.75 : 102,779.50 = 102,779.50 : x
  2. Step 2: Convert to fraction form
    75,641.75/102,779.50 = 102,779.50/x
  3. Step 3: Cross multiply
    75,641.75x = 102,779.50 × 102,779.50
  4. Step 4: Simplify right side
    75,641.75x = 10,563,625,620.25
  5. Step 5: Solve for x
    x = 10,563,625,620.25/75,641.75
  6. Step 6: Final answer
    x = 139,653.37

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.