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Finding the Fourth Proportional to 159,389, 238,979.60 and 73,964.80

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Solution

The fourth proportional to 159,389, 238,979.60 and 73,964.80 is: 110,898.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,389 : 238,979.60 = 73,964.80 : x
  2. Step 2: Convert to fraction form
    159,389/238,979.60 = 73,964.80/x
  3. Step 3: Cross multiply
    159,389x = 238,979.60 × 73,964.80
  4. Step 4: Simplify right side
    159,389x = 17,676,078,318.08
  5. Step 5: Solve for x
    x = 17,676,078,318.08/159,389
  6. Step 6: Final answer
    x = 110,898.98

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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.