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Finding the Third Proportional to 89,328 and 138,312

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Solution

The third proportional to 89,328 and 138,312 is: 214,156.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,328 : 138,312 = 138,312 : x
  2. Step 2: Convert to fraction form
    89,328/138,312 = 138,312/x
  3. Step 3: Cross multiply
    89,328x = 138,312 × 138,312
  4. Step 4: Simplify right side
    89,328x = 19,130,209,344
  5. Step 5: Solve for x
    x = 19,130,209,344/89,328
  6. Step 6: Final answer
    x = 214,156.92

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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.