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Finding the Fourth Proportional to 64,893.99, 97,358.28 and 20,521.56

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Solution

The fourth proportional to 64,893.99, 97,358.28 and 20,521.56 is: 30,787.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,893.99 : 97,358.28 = 20,521.56 : x
  2. Step 2: Convert to fraction form
    64,893.99/97,358.28 = 20,521.56/x
  3. Step 3: Cross multiply
    64,893.99x = 97,358.28 × 20,521.56
  4. Step 4: Simplify right side
    64,893.99x = 1,997,943,784.52
  5. Step 5: Solve for x
    x = 1,997,943,784.52/64,893.99
  6. Step 6: Final answer
    x = 30,787.81

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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.