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Finding the Fourth Proportional to 155,787.99, 214,987.44 and 84,168.03

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Solution

The fourth proportional to 155,787.99, 214,987.44 and 84,168.03 is: 116,151.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,787.99 : 214,987.44 = 84,168.03 : x
  2. Step 2: Convert to fraction form
    155,787.99/214,987.44 = 84,168.03/x
  3. Step 3: Cross multiply
    155,787.99x = 214,987.44 × 84,168.03
  4. Step 4: Simplify right side
    155,787.99x = 18,095,069,299.54
  5. Step 5: Solve for x
    x = 18,095,069,299.54/155,787.99
  6. Step 6: Final answer
    x = 116,151.89

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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.