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Finding the Fourth Proportional to 258,521.77, 387,787.52 and 81,024.85

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Solution

The fourth proportional to 258,521.77, 387,787.52 and 81,024.85 is: 121,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,521.77 : 387,787.52 = 81,024.85 : x
  2. Step 2: Convert to fraction form
    258,521.77/387,787.52 = 81,024.85/x
  3. Step 3: Cross multiply
    258,521.77x = 387,787.52 × 81,024.85
  4. Step 4: Simplify right side
    258,521.77x = 31,420,425,234.75
  5. Step 5: Solve for x
    x = 31,420,425,234.75/258,521.77
  6. Step 6: Final answer
    x = 121,538.80

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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.