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Finding the Third Proportional to 31,117.50 and 48,261

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Solution

The third proportional to 31,117.50 and 48,261 is: 74,849.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,117.50 : 48,261 = 48,261 : x
  2. Step 2: Convert to fraction form
    31,117.50/48,261 = 48,261/x
  3. Step 3: Cross multiply
    31,117.50x = 48,261 × 48,261
  4. Step 4: Simplify right side
    31,117.50x = 2,329,124,121
  5. Step 5: Solve for x
    x = 2,329,124,121/31,117.50
  6. Step 6: Final answer
    x = 74,849.33

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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.