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Finding the Third Proportional to 85,887 and 128,435

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Solution

The third proportional to 85,887 and 128,435 is: 192,061.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,887 : 128,435 = 128,435 : x
  2. Step 2: Convert to fraction form
    85,887/128,435 = 128,435/x
  3. Step 3: Cross multiply
    85,887x = 128,435 × 128,435
  4. Step 4: Simplify right side
    85,887x = 16,495,549,225
  5. Step 5: Solve for x
    x = 16,495,549,225/85,887
  6. Step 6: Final answer
    x = 192,061.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.