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Finding the Fourth Proportional to 87,396.51, 120,616.43 and 53,424.89

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Solution

The fourth proportional to 87,396.51, 120,616.43 and 53,424.89 is: 73,731.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,396.51 : 120,616.43 = 53,424.89 : x
  2. Step 2: Convert to fraction form
    87,396.51/120,616.43 = 53,424.89/x
  3. Step 3: Cross multiply
    87,396.51x = 120,616.43 × 53,424.89
  4. Step 4: Simplify right side
    87,396.51x = 6,443,919,035.42
  5. Step 5: Solve for x
    x = 6,443,919,035.42/87,396.51
  6. Step 6: Final answer
    x = 73,731.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.