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Finding the Third Proportional to 58,518 and 128,178

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Solution

The third proportional to 58,518 and 128,178 is: 280,761.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,518 : 128,178 = 128,178 : x
  2. Step 2: Convert to fraction form
    58,518/128,178 = 128,178/x
  3. Step 3: Cross multiply
    58,518x = 128,178 × 128,178
  4. Step 4: Simplify right side
    58,518x = 16,429,599,684
  5. Step 5: Solve for x
    x = 16,429,599,684/58,518
  6. Step 6: Final answer
    x = 280,761.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.