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Finding the Third Proportional to 78,426 and 119,988

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Solution

The third proportional to 78,426 and 119,988 is: 183,575.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,426 : 119,988 = 119,988 : x
  2. Step 2: Convert to fraction form
    78,426/119,988 = 119,988/x
  3. Step 3: Cross multiply
    78,426x = 119,988 × 119,988
  4. Step 4: Simplify right side
    78,426x = 14,397,120,144
  5. Step 5: Solve for x
    x = 14,397,120,144/78,426
  6. Step 6: Final answer
    x = 183,575.86

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.