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Finding the Fourth Proportional to 128,462.10, 192,693.15 and 123,213.30

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Solution

The fourth proportional to 128,462.10, 192,693.15 and 123,213.30 is: 184,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,462.10 : 192,693.15 = 123,213.30 : x
  2. Step 2: Convert to fraction form
    128,462.10/192,693.15 = 123,213.30/x
  3. Step 3: Cross multiply
    128,462.10x = 192,693.15 × 123,213.30
  4. Step 4: Simplify right side
    128,462.10x = 23,742,358,898.90
  5. Step 5: Solve for x
    x = 23,742,358,898.90/128,462.10
  6. Step 6: Final answer
    x = 184,819.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.