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Finding the Third Proportional to 58,905 and 87,213

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Solution

The third proportional to 58,905 and 87,213 is: 129,124.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,905 : 87,213 = 87,213 : x
  2. Step 2: Convert to fraction form
    58,905/87,213 = 87,213/x
  3. Step 3: Cross multiply
    58,905x = 87,213 × 87,213
  4. Step 4: Simplify right side
    58,905x = 7,606,107,369
  5. Step 5: Solve for x
    x = 7,606,107,369/58,905
  6. Step 6: Final answer
    x = 129,124.99

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.