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Finding the Third Proportional to 53,472 and 78,672

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Solution

The third proportional to 53,472 and 78,672 is: 115,748.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,472 : 78,672 = 78,672 : x
  2. Step 2: Convert to fraction form
    53,472/78,672 = 78,672/x
  3. Step 3: Cross multiply
    53,472x = 78,672 × 78,672
  4. Step 4: Simplify right side
    53,472x = 6,189,283,584
  5. Step 5: Solve for x
    x = 6,189,283,584/53,472
  6. Step 6: Final answer
    x = 115,748.12

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.