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Finding the Fourth Proportional to 64,893.92, 97,340.27 and 20,520.70

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Solution

The fourth proportional to 64,893.92, 97,340.27 and 20,520.70 is: 30,780.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,893.92 : 97,340.27 = 20,520.70 : x
  2. Step 2: Convert to fraction form
    64,893.92/97,340.27 = 20,520.70/x
  3. Step 3: Cross multiply
    64,893.92x = 97,340.27 × 20,520.70
  4. Step 4: Simplify right side
    64,893.92x = 1,997,490,478.59
  5. Step 5: Solve for x
    x = 1,997,490,478.59/64,893.92
  6. Step 6: Final answer
    x = 30,780.86

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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.