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Finding the Fourth Proportional to 128,469.10, 192,703.65 and 123,220.30

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Solution

The fourth proportional to 128,469.10, 192,703.65 and 123,220.30 is: 184,830.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,469.10 : 192,703.65 = 123,220.30 : x
  2. Step 2: Convert to fraction form
    128,469.10/192,703.65 = 123,220.30/x
  3. Step 3: Cross multiply
    128,469.10x = 192,703.65 × 123,220.30
  4. Step 4: Simplify right side
    128,469.10x = 23,745,001,564.10
  5. Step 5: Solve for x
    x = 23,745,001,564.10/128,469.10
  6. Step 6: Final answer
    x = 184,830.45

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1.5x scale

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.