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Finding the Fourth Proportional to 64,879.60, 97,305.56 and 20,509.84

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Solution

The fourth proportional to 64,879.60, 97,305.56 and 20,509.84 is: 30,760.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,879.60 : 97,305.56 = 20,509.84 : x
  2. Step 2: Convert to fraction form
    64,879.60/97,305.56 = 20,509.84/x
  3. Step 3: Cross multiply
    64,879.60x = 97,305.56 × 20,509.84
  4. Step 4: Simplify right side
    64,879.60x = 1,995,721,466.71
  5. Step 5: Solve for x
    x = 1,995,721,466.71/64,879.60
  6. Step 6: Final answer
    x = 30,760.38

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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.