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Finding the Third Proportional to 90,313 and 140,639

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Solution

The third proportional to 90,313 and 140,639 is: 219,008.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,313 : 140,639 = 140,639 : x
  2. Step 2: Convert to fraction form
    90,313/140,639 = 140,639/x
  3. Step 3: Cross multiply
    90,313x = 140,639 × 140,639
  4. Step 4: Simplify right side
    90,313x = 19,779,328,321
  5. Step 5: Solve for x
    x = 19,779,328,321/90,313
  6. Step 6: Final answer
    x = 219,008.65

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.