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Finding the Third Proportional to 122,117.50 and 257,355

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Solution

The third proportional to 122,117.50 and 257,355 is: 542,359.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,117.50 : 257,355 = 257,355 : x
  2. Step 2: Convert to fraction form
    122,117.50/257,355 = 257,355/x
  3. Step 3: Cross multiply
    122,117.50x = 257,355 × 257,355
  4. Step 4: Simplify right side
    122,117.50x = 66,231,596,025
  5. Step 5: Solve for x
    x = 66,231,596,025/122,117.50
  6. Step 6: Final answer
    x = 542,359.58

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.