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Finding the Fourth Proportional to 158,352.23, 218,541.79 and 90,379.47

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Solution

The fourth proportional to 158,352.23, 218,541.79 and 90,379.47 is: 124,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,352.23 : 218,541.79 = 90,379.47 : x
  2. Step 2: Convert to fraction form
    158,352.23/218,541.79 = 90,379.47/x
  3. Step 3: Cross multiply
    158,352.23x = 218,541.79 × 90,379.47
  4. Step 4: Simplify right side
    158,352.23x = 19,751,691,153.05
  5. Step 5: Solve for x
    x = 19,751,691,153.05/158,352.23
  6. Step 6: Final answer
    x = 124,732.64

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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.