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Finding the Third Proportional to 60,478 and 128,276

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Solution

The third proportional to 60,478 and 128,276 is: 272,077.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,478 : 128,276 = 128,276 : x
  2. Step 2: Convert to fraction form
    60,478/128,276 = 128,276/x
  3. Step 3: Cross multiply
    60,478x = 128,276 × 128,276
  4. Step 4: Simplify right side
    60,478x = 16,454,732,176
  5. Step 5: Solve for x
    x = 16,454,732,176/60,478
  6. Step 6: Final answer
    x = 272,077.98

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.