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Finding the Third Proportional to 30,428 and 66,460

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Solution

The third proportional to 30,428 and 66,460 is: 145,160.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,428 : 66,460 = 66,460 : x
  2. Step 2: Convert to fraction form
    30,428/66,460 = 66,460/x
  3. Step 3: Cross multiply
    30,428x = 66,460 × 66,460
  4. Step 4: Simplify right side
    30,428x = 4,416,931,600
  5. Step 5: Solve for x
    x = 4,416,931,600/30,428
  6. Step 6: Final answer
    x = 145,160.10

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.