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Finding the Fourth Proportional to 64,628.70, 96,942.87 and 20,255.64

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Solution

The fourth proportional to 64,628.70, 96,942.87 and 20,255.64 is: 30,383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,628.70 : 96,942.87 = 20,255.64 : x
  2. Step 2: Convert to fraction form
    64,628.70/96,942.87 = 20,255.64/x
  3. Step 3: Cross multiply
    64,628.70x = 96,942.87 × 20,255.64
  4. Step 4: Simplify right side
    64,628.70x = 1,963,639,875.29
  5. Step 5: Solve for x
    x = 1,963,639,875.29/64,628.70
  6. Step 6: Final answer
    x = 30,383.40

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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.