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Finding the Fourth Proportional to 128,462.40, 192,693.60 and 54,734.40

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Solution

The fourth proportional to 128,462.40, 192,693.60 and 54,734.40 is: 82,101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,462.40 : 192,693.60 = 54,734.40 : x
  2. Step 2: Convert to fraction form
    128,462.40/192,693.60 = 54,734.40/x
  3. Step 3: Cross multiply
    128,462.40x = 192,693.60 × 54,734.40
  4. Step 4: Simplify right side
    128,462.40x = 10,546,968,579.84
  5. Step 5: Solve for x
    x = 10,546,968,579.84/128,462.40
  6. Step 6: Final answer
    x = 82,101.60

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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.