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Finding the Fourth Proportional to 87,521.79, 120,731.44 and 57,355.77

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Solution

The fourth proportional to 87,521.79, 120,731.44 and 57,355.77 is: 79,119.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,521.79 : 120,731.44 = 57,355.77 : x
  2. Step 2: Convert to fraction form
    87,521.79/120,731.44 = 57,355.77/x
  3. Step 3: Cross multiply
    87,521.79x = 120,731.44 × 57,355.77
  4. Step 4: Simplify right side
    87,521.79x = 6,924,644,417.63
  5. Step 5: Solve for x
    x = 6,924,644,417.63/87,521.79
  6. Step 6: Final answer
    x = 79,119.09

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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.