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Finding the Fourth Proportional to 74,787.99, 112,234.49 and 67,641.51

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Solution

The fourth proportional to 74,787.99, 112,234.49 and 67,641.51 is: 101,509.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,787.99 : 112,234.49 = 67,641.51 : x
  2. Step 2: Convert to fraction form
    74,787.99/112,234.49 = 67,641.51/x
  3. Step 3: Cross multiply
    74,787.99x = 112,234.49 × 67,641.51
  4. Step 4: Simplify right side
    74,787.99x = 7,591,710,039.47
  5. Step 5: Solve for x
    x = 7,591,710,039.47/74,787.99
  6. Step 6: Final answer
    x = 101,509.75

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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.