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Finding the Third Proportional to 72,490 and 155,708

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Solution

The third proportional to 72,490 and 155,708 is: 334,459.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490 : 155,708 = 155,708 : x
  2. Step 2: Convert to fraction form
    72,490/155,708 = 155,708/x
  3. Step 3: Cross multiply
    72,490x = 155,708 × 155,708
  4. Step 4: Simplify right side
    72,490x = 24,244,981,264
  5. Step 5: Solve for x
    x = 24,244,981,264/72,490
  6. Step 6: Final answer
    x = 334,459.67

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.