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Finding the Fourth Proportional to 74,787.99, 112,149.10 and 28,008.06

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Solution

The fourth proportional to 74,787.99, 112,149.10 and 28,008.06 is: 41,999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,787.99 : 112,149.10 = 28,008.06 : x
  2. Step 2: Convert to fraction form
    74,787.99/112,149.10 = 28,008.06/x
  3. Step 3: Cross multiply
    74,787.99x = 112,149.10 × 28,008.06
  4. Step 4: Simplify right side
    74,787.99x = 3,141,078,721.75
  5. Step 5: Solve for x
    x = 3,141,078,721.75/74,787.99
  6. Step 6: Final answer
    x = 41,999.77

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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.