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Finding the Third Proportional to 71,490 and 157,080

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Solution

The third proportional to 71,490 and 157,080 is: 345,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,490 : 157,080 = 157,080 : x
  2. Step 2: Convert to fraction form
    71,490/157,080 = 157,080/x
  3. Step 3: Cross multiply
    71,490x = 157,080 × 157,080
  4. Step 4: Simplify right side
    71,490x = 24,674,126,400
  5. Step 5: Solve for x
    x = 24,674,126,400/71,490
  6. Step 6: Final answer
    x = 345,140.95

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.