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Finding the Fourth Proportional to 64,872.20, 97,308.30 and 53,791.40

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Solution

The fourth proportional to 64,872.20, 97,308.30 and 53,791.40 is: 80,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,872.20 : 97,308.30 = 53,791.40 : x
  2. Step 2: Convert to fraction form
    64,872.20/97,308.30 = 53,791.40/x
  3. Step 3: Cross multiply
    64,872.20x = 97,308.30 × 53,791.40
  4. Step 4: Simplify right side
    64,872.20x = 5,234,349,688.62
  5. Step 5: Solve for x
    x = 5,234,349,688.62/64,872.20
  6. Step 6: Final answer
    x = 80,687.10

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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.