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Finding the Third Proportional to 42,072 and 90,702

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Solution

The third proportional to 42,072 and 90,702 is: 195,542.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,072 : 90,702 = 90,702 : x
  2. Step 2: Convert to fraction form
    42,072/90,702 = 90,702/x
  3. Step 3: Cross multiply
    42,072x = 90,702 × 90,702
  4. Step 4: Simplify right side
    42,072x = 8,226,852,804
  5. Step 5: Solve for x
    x = 8,226,852,804/42,072
  6. Step 6: Final answer
    x = 195,542.23

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.