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Finding the Third Proportional to 78,220.50 and 170,779.50

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Solution

The third proportional to 78,220.50 and 170,779.50 is: 372,864.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,220.50 : 170,779.50 = 170,779.50 : x
  2. Step 2: Convert to fraction form
    78,220.50/170,779.50 = 170,779.50/x
  3. Step 3: Cross multiply
    78,220.50x = 170,779.50 × 170,779.50
  4. Step 4: Simplify right side
    78,220.50x = 29,165,637,620.25
  5. Step 5: Solve for x
    x = 29,165,637,620.25/78,220.50
  6. Step 6: Final answer
    x = 372,864.37

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.