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Finding the Third Proportional to 78,175 and 121,124

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Solution

The third proportional to 78,175 and 121,124 is: 187,668.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,175 : 121,124 = 121,124 : x
  2. Step 2: Convert to fraction form
    78,175/121,124 = 121,124/x
  3. Step 3: Cross multiply
    78,175x = 121,124 × 121,124
  4. Step 4: Simplify right side
    78,175x = 14,671,023,376
  5. Step 5: Solve for x
    x = 14,671,023,376/78,175
  6. Step 6: Final answer
    x = 187,668.99

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.