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Finding the Third Proportional to 156,278 and 242,139

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Solution

The third proportional to 156,278 and 242,139 is: 375,173.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,278 : 242,139 = 242,139 : x
  2. Step 2: Convert to fraction form
    156,278/242,139 = 242,139/x
  3. Step 3: Cross multiply
    156,278x = 242,139 × 242,139
  4. Step 4: Simplify right side
    156,278x = 58,631,295,321
  5. Step 5: Solve for x
    x = 58,631,295,321/156,278
  6. Step 6: Final answer
    x = 375,173.06

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.