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Finding the Fourth Proportional to 179,388.60, 268,985.70 and 74,218.20

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Solution

The fourth proportional to 179,388.60, 268,985.70 and 74,218.20 is: 111,287.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,388.60 : 268,985.70 = 74,218.20 : x
  2. Step 2: Convert to fraction form
    179,388.60/268,985.70 = 74,218.20/x
  3. Step 3: Cross multiply
    179,388.60x = 268,985.70 × 74,218.20
  4. Step 4: Simplify right side
    179,388.60x = 19,963,634,479.74
  5. Step 5: Solve for x
    x = 19,963,634,479.74/179,388.60
  6. Step 6: Final answer
    x = 111,287.09

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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.