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Finding the Third Proportional to 77,600 and 117,840

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Solution

The third proportional to 77,600 and 117,840 is: 178,946.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,600 : 117,840 = 117,840 : x
  2. Step 2: Convert to fraction form
    77,600/117,840 = 117,840/x
  3. Step 3: Cross multiply
    77,600x = 117,840 × 117,840
  4. Step 4: Simplify right side
    77,600x = 13,886,265,600
  5. Step 5: Solve for x
    x = 13,886,265,600/77,600
  6. Step 6: Final answer
    x = 178,946.72

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.