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Finding the Fourth Proportional to 223,379.61, 335,068.74 and 90,258.30

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Solution

The fourth proportional to 223,379.61, 335,068.74 and 90,258.30 is: 135,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,379.61 : 335,068.74 = 90,258.30 : x
  2. Step 2: Convert to fraction form
    223,379.61/335,068.74 = 90,258.30/x
  3. Step 3: Cross multiply
    223,379.61x = 335,068.74 × 90,258.30
  4. Step 4: Simplify right side
    223,379.61x = 30,242,734,855.54
  5. Step 5: Solve for x
    x = 30,242,734,855.54/223,379.61
  6. Step 6: Final answer
    x = 135,387.18

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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.