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Finding the Third Proportional to 72,428.75 and 156,916.75

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Solution

The third proportional to 72,428.75 and 156,916.75 is: 339,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.75 : 156,916.75 = 156,916.75 : x
  2. Step 2: Convert to fraction form
    72,428.75/156,916.75 = 156,916.75/x
  3. Step 3: Cross multiply
    72,428.75x = 156,916.75 × 156,916.75
  4. Step 4: Simplify right side
    72,428.75x = 24,622,866,430.56
  5. Step 5: Solve for x
    x = 24,622,866,430.56/72,428.75
  6. Step 6: Final answer
    x = 339,959.84

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.