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Finding the Third Proportional to 60,480 and 128,280

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Solution

The third proportional to 60,480 and 128,280 is: 272,085.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,480 : 128,280 = 128,280 : x
  2. Step 2: Convert to fraction form
    60,480/128,280 = 128,280/x
  3. Step 3: Cross multiply
    60,480x = 128,280 × 128,280
  4. Step 4: Simplify right side
    60,480x = 16,455,758,400
  5. Step 5: Solve for x
    x = 16,455,758,400/60,480
  6. Step 6: Final answer
    x = 272,085.95

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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.