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Finding the Third Proportional to 59,688 and 129,920

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Solution

The third proportional to 59,688 and 129,920 is: 282,790.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,688 : 129,920 = 129,920 : x
  2. Step 2: Convert to fraction form
    59,688/129,920 = 129,920/x
  3. Step 3: Cross multiply
    59,688x = 129,920 × 129,920
  4. Step 4: Simplify right side
    59,688x = 16,879,206,400
  5. Step 5: Solve for x
    x = 16,879,206,400/59,688
  6. Step 6: Final answer
    x = 282,790.62

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.