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Finding the Third Proportional to 128,592 and 189,158

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Solution

The third proportional to 128,592 and 189,158 is: 278,250.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592 : 189,158 = 189,158 : x
  2. Step 2: Convert to fraction form
    128,592/189,158 = 189,158/x
  3. Step 3: Cross multiply
    128,592x = 189,158 × 189,158
  4. Step 4: Simplify right side
    128,592x = 35,780,748,964
  5. Step 5: Solve for x
    x = 35,780,748,964/128,592
  6. Step 6: Final answer
    x = 278,250.19

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.