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Finding the Fourth Proportional to 64,778.92, 97,171.82 and 20,409.12

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Solution

The fourth proportional to 64,778.92, 97,171.82 and 20,409.12 is: 30,614.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,778.92 : 97,171.82 = 20,409.12 : x
  2. Step 2: Convert to fraction form
    64,778.92/97,171.82 = 20,409.12/x
  3. Step 3: Cross multiply
    64,778.92x = 97,171.82 × 20,409.12
  4. Step 4: Simplify right side
    64,778.92x = 1,983,191,335.00
  5. Step 5: Solve for x
    x = 1,983,191,335.00/64,778.92
  6. Step 6: Final answer
    x = 30,614.76

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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.