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Finding the Third Proportional to 72,216 and 115,320

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Solution

The third proportional to 72,216 and 115,320 is: 184,151.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,216 : 115,320 = 115,320 : x
  2. Step 2: Convert to fraction form
    72,216/115,320 = 115,320/x
  3. Step 3: Cross multiply
    72,216x = 115,320 × 115,320
  4. Step 4: Simplify right side
    72,216x = 13,298,702,400
  5. Step 5: Solve for x
    x = 13,298,702,400/72,216
  6. Step 6: Final answer
    x = 184,151.74

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.